This is DVItype, Version 2.7
Options selected:
  Starting page = * 
  Maximum number of pages = 1000000
  Output level = 1 (terse)
  Resolution =  240.00000000 pixels per inch
numerator/denominator=25400000/473628672
magnification=1000;       0.00005067 pixels per DVI unit
' TeX output 1984.10.21:2021'
 
42: beginning of page 811 
87: down3 2359296 v:=0+2359296=2359296, vv:=120 
91: push 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
92: down3 -1703936 v:=2359296-1703936=655360, vv:=33 
96: push 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
[ ]
102: fntdef1 36: amti10---loaded at size 655360 DVI units 
124: fntnum36 current font is amti10 
[Experimental Pages for The T]
160: push 
level 2:(h=20796027,v=655360,w=234473,x=-33497,y=0,z=0,hh=1054,vv=33) 
165: down3 141084 v:=655360+141084=796444, vv:=40 
[E]
170: pop 
level 2:(h=20796027,v=655360,w=234473,x=-33497,y=0,z=0,hh=1054,vv=33) 
[ Xbook]
182: push 
level 2:(h=22735986,v=655360,w=234473,x=-33497,y=0,z=0,hh=1151,vv=33) 
[ ]
187: fntdef1 23: ambx10---loaded at size 655360 DVI units 
209: fntnum23 current font is ambx10 
[811]
213: pop 
level 2:(h=22735986,v=655360,w=234473,x=-33497,y=0,z=0,hh=1151,vv=33) 
214: pop 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
215: pop 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
216: down4 34603008 v:=2359296+34603008=36962304, vv:=1873 
221: push 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
222: down4 -34603008 v:=36962304-34603008=2359296, vv:=120 
227: push 
level 1:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
228: push 
level 2:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
229: down3 655360 v:=2359296+655360=3014656, vv:=153 
233: push 
level 3:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
234: push 
level 4:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
[ ]
240: fntdef1 3: amr7---loaded at size 458752 DVI units 
260: fntnum3 current font is amr7 
[>>]
263: pop 
level 4:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
264: pop 
level 3:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
265: pop 
level 2:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
266: pop 
level 1:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
267: down3 655360 v:=2359296+655360=3014656, vv:=153 
271: push 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
[ ]
276: fntdef1 0: amr10---loaded at size 655360 DVI units 
297: fntnum0 current font is amr10 
[This has been a long chapter, but take heart: There's only one more]
381: pop 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
382: y3 786432 v:=3014656+786432=3801088, vv:=193 
386: push 
level 1:(h=0,v=3801088,w=0,x=0,y=786432,z=0,hh=0,vv=193) 
[experiment to do, and then you will know enough about ]
458: fntdef1 72: manual---loaded at size 655360 DVI units 
480: fnt1 72 current font is manual 
[METAFONT ]
497: fntnum0 current font is amr10 
[to run it]
507: pop 
level 1:(h=0,v=3801088,w=0,x=0,y=786432,z=0,hh=0,vv=193) 
508: y0 786432 v:=3801088+786432=4587520, vv:=232 
509: push 
level 1:(h=0,v=4587520,w=0,x=0,y=786432,z=0,hh=0,vv=232) 
[fearlessly by yourself forever after. The only thing you are still missing is]
[ some]
604: pop 
level 1:(h=0,v=4587520,w=0,x=0,y=786432,z=0,hh=0,vv=232) 
605: y0 786432 v:=4587520+786432=5373952, vv:=272 
606: push 
level 1:(h=0,v=5373952,w=0,x=0,y=786432,z=0,hh=0,vv=272) 
[information about how to cope with error messages; sometimes ]
681: fnt1 72 current font is manual 
[METAFONT ]
698: fntnum0 current font is amr10 
[stops]
704: pop 
level 1:(h=0,v=5373952,w=0,x=0,y=786432,z=0,hh=0,vv=272) 
705: y0 786432 v:=5373952+786432=6160384, vv:=312 
706: push 
level 1:(h=0,v=6160384,w=0,x=0,y=786432,z=0,hh=0,vv=312) 
[and asks you what to do next. Indeed, this may have already happened, and]
801: pop 
level 1:(h=0,v=6160384,w=0,x=0,y=786432,z=0,hh=0,vv=312) 
802: y0 786432 v:=6160384+786432=6946816, vv:=352 
803: push 
level 1:(h=0,v=6946816,w=0,x=0,y=786432,z=0,hh=0,vv=352) 
[you may have panicked.]
837: pop 
level 1:(h=0,v=6946816,w=0,x=0,y=786432,z=0,hh=0,vv=352) 
838: z3 805456 v:=6946816+805456=7752272, vv:=393 
842: push 
level 1:(h=0,v=7752272,w=0,x=0,y=786432,z=805456,hh=0,vv=393) 
[ Error messages can be terrifying when you aren't prepared for them;]
923: pop 
level 1:(h=0,v=7752272,w=0,x=0,y=786432,z=805456,hh=0,vv=393) 
924: y0 786432 v:=7752272+786432=8538704, vv:=433 
925: push 
level 1:(h=0,v=8538704,w=0,x=0,y=786432,z=805456,hh=0,vv=433) 
[but they can be fun when you have the right attitude. Just remember that]
1017: pop 
level 1:(h=0,v=8538704,w=0,x=0,y=786432,z=805456,hh=0,vv=433) 
1018: y0 786432 v:=8538704+786432=9325136, vv:=473 
1019: push 
level 1:(h=0,v=9325136,w=0,x=0,y=786432,z=805456,hh=0,vv=473) 
[you really haven't hurt the computer's feelings, and that nobody will hold th]
[e]
1117: pop 
level 1:(h=0,v=9325136,w=0,x=0,y=786432,z=805456,hh=0,vv=473) 
1118: y0 786432 v:=9325136+786432=10111568, vv:=512 
1119: push 
level 1:(h=0,v=10111568,w=0,x=0,y=786432,z=805456,hh=0,vv=512) 
[errors against you. Then you'll ]
1162: setchar12 h:=9073701+364088=9437789, hh:=478 
[nd that running ]
1179: fnt1 72 current font is manual 
[METAFONT ]
1196: fntnum0 current font is amr10 
[might actually be]
1218: pop 
level 1:(h=0,v=10111568,w=0,x=0,y=786432,z=805456,hh=0,vv=512) 
1219: y0 786432 v:=10111568+786432=10898000, vv:=552 
1220: push 
level 1:(h=0,v=10898000,w=0,x=0,y=786432,z=805456,hh=0,vv=552) 
[a creative experience instead of something to be dreaded.]
1288: pop 
level 1:(h=0,v=10898000,w=0,x=0,y=786432,z=805456,hh=0,vv=552) 
1289: z0 805456 v:=10898000+805456=11703456, vv:=593 
1290: push 
level 1:(h=0,v=11703456,w=0,x=0,y=786432,z=805456,hh=0,vv=593) 
[ The ]
1302: setchar12 h:=3723189+364088=4087277, hh:=207 
[rst step in Experiment 5 is to plant some intentional mistakes in]
1378: pop 
level 1:(h=0,v=11703456,w=0,x=0,y=786432,z=805456,hh=0,vv=593) 
1379: y0 786432 v:=11703456+786432=12489888, vv:=633 
1380: push 
level 1:(h=0,v=12489888,w=0,x=0,y=786432,z=805456,hh=0,vv=633) 
[the input ]
1394: setchar12 h:=2854699+364088=3218787, hh:=163 
[le. Make a copy of ]
1421: fntdef1 29: amtt10---loaded at size 655360 DVI units 
1443: fntnum29 current font is amtt10 
[io.mf ]
1450: fntnum0 current font is amr10 
[and call it ]
1463: fntnum29 current font is amtt10 
[badio.mf]
1472: fntnum0 current font is amr10 
[; then change line 1 of]
1500: pop 
level 1:(h=0,v=12489888,w=0,x=0,y=786432,z=805456,hh=0,vv=633) 
1501: y0 786432 v:=12489888+786432=13276320, vv:=673 
1502: push 
level 1:(h=0,v=13276320,w=0,x=0,y=786432,z=805456,hh=0,vv=673) 
1503: fntnum29 current font is amtt10 
[badio.mf ]
1516: fntnum0 current font is amr10 
[to]
1519: pop 
level 1:(h=0,v=13276320,w=0,x=0,y=786432,z=805456,hh=0,vv=673) 
1520: y3 1236719 v:=13276320+1236719=14513039, vv:=735 
1524: push 
level 1:(h=0,v=14513039,w=0,x=0,y=1236719,z=805456,hh=0,vv=735) 
1525: push 
level 2:(h=0,v=14513039,w=0,x=0,y=1236719,z=805456,hh=0,vv=735) 
1526: push 
level 3:(h=0,v=14513039,w=0,x=0,y=1236719,z=805456,hh=0,vv=735) 
[ ]
1531: fntnum29 current font is amtt10 
[mode setup; % an intentional error!]
1570: pop 
level 3:(h=0,v=14513039,w=0,x=0,y=1236719,z=805456,hh=0,vv=735) 
1571: pop 
level 2:(h=0,v=14513039,w=0,x=0,y=1236719,z=805456,hh=0,vv=735) 
1572: pop 
level 1:(h=0,v=14513039,w=0,x=0,y=1236719,z=805456,hh=0,vv=735) 
1573: y0 1236719 v:=14513039+1236719=15749758, vv:=798 
1574: push 
level 1:(h=0,v=15749758,w=0,x=0,y=1236719,z=805456,hh=0,vv=798) 
1575: fntnum0 current font is amr10 
[(thereby omitting the underline character in ]
1628: fntnum29 current font is amtt10 
[mode_setup]
1639: fntnum0 current font is amr10 
[). Also change the ]
1663: setchar12 h:=21670116+364088=22034204, hh:=1116 
[rst]
1667: pop 
level 1:(h=0,v=15749758,w=0,x=0,y=1236719,z=805456,hh=0,vv=798) 
1668: y3 786432 v:=15749758+786432=16536190, vv:=838 
1672: push 
level 1:(h=0,v=16536190,w=0,x=0,y=786432,z=805456,hh=0,vv=838) 
[semicolon ( `]
1692: fntnum29 current font is amtt10 
[;]
1694: fntnum0 current font is amr10 
[' ) on line 2 to a colon ( `]
1726: fntnum29 current font is amtt10 
[:]
1728: fntnum0 current font is amr10 
[' ); change `]
1748: fntnum29 current font is amtt10 
[thick,10]
1757: fntnum0 current font is amr10 
[' to `]
1764: fntnum29 current font is amtt10 
[thick,l0]
1773: fntnum0 current font is amr10 
[' on]
1778: pop 
level 1:(h=0,v=16536190,w=0,x=0,y=786432,z=805456,hh=0,vv=838) 
1779: y0 786432 v:=16536190+786432=17322622, vv:=878 
1780: push 
level 1:(h=0,v=17322622,w=0,x=0,y=786432,z=805456,hh=0,vv=878) 
[line 10 (i.e., replace the numeral `]
1826: fntnum29 current font is amtt10 
[1]
1828: fntnum0 current font is amr10 
[' by the letter `]
1847: fntnum29 current font is amtt10 
[l]
1849: fntnum0 current font is amr10 
[' ); and change `]
1874: fntnum29 current font is amtt10 
[thin]
1879: fntnum0 current font is amr10 
[' to]
1884: pop 
level 1:(h=0,v=17322622,w=0,x=0,y=786432,z=805456,hh=0,vv=878) 
1885: y0 786432 v:=17322622+786432=18109054, vv:=918 
1886: push 
level 1:(h=0,v=18109054,w=0,x=0,y=786432,z=805456,hh=0,vv=918) 
[`]
1888: fntnum29 current font is amtt10 
[thinn]
1894: fntnum0 current font is amr10 
[' on line 11. These four changes introduce typical typographic errors, and]
1990: pop 
level 1:(h=0,v=18109054,w=0,x=0,y=786432,z=805456,hh=0,vv=918) 
1991: y0 786432 v:=18109054+786432=18895486, vv:=957 
1992: push 
level 1:(h=0,v=18895486,w=0,x=0,y=786432,z=805456,hh=0,vv=957) 
[it will be instructive to see if they lead to any disastrous consequences.]
2077: pop 
level 1:(h=0,v=18895486,w=0,x=0,y=786432,z=805456,hh=0,vv=957) 
2078: z0 805456 v:=18895486+805456=19700942, vv:=998 
2079: push 
level 1:(h=0,v=19700942,w=0,x=0,y=786432,z=805456,hh=0,vv=998) 
[ Now run ]
2098: fnt1 72 current font is manual 
[METAFONT ]
2115: fntnum0 current font is amr10 
[again; but instead of cooperating with the com-]
2173: pop 
level 1:(h=0,v=19700942,w=0,x=0,y=786432,z=805456,hh=0,vv=998) 
2174: y0 786432 v:=19700942+786432=20487374, vv:=1038 
2175: push 
level 1:(h=0,v=20487374,w=0,x=0,y=786432,z=805456,hh=0,vv=1038) 
[puter, type `]
2201: fntnum29 current font is amtt10 
[mumble]
2208: fntnum0 current font is amr10 
[' in reply to the `]
2228: fntnum29 current font is amtt10 
[**]
2231: fntnum0 current font is amr10 
['. (As long as you're going to make]
2272: pop 
level 1:(h=0,v=20487374,w=0,x=0,y=786432,z=805456,hh=0,vv=1038) 
2273: y0 786432 v:=20487374+786432=21273806, vv:=1078 
2274: push 
level 1:(h=0,v=21273806,w=0,x=0,y=786432,z=805456,hh=0,vv=1078) 
[intentional mistakes, you might as well make some dillies.) ]
2353: fnt1 72 current font is manual 
[METAFONT ]
2370: fntnum0 current font is amr10 
[will say]
2380: pop 
level 1:(h=0,v=21273806,w=0,x=0,y=786432,z=805456,hh=0,vv=1078) 
2381: y0 786432 v:=21273806+786432=22060238, vv:=1118 
2382: push 
level 1:(h=0,v=22060238,w=0,x=0,y=786432,z=805456,hh=0,vv=1118) 
[that it can't ]
2400: setchar12 h:=3908078+364088=4272166, hh:=216 
[nd any ]
2411: setchar12 h:=6586279+364088=6950367, hh:=352 
[le called ]
2422: fntnum29 current font is amtt10 
[mumble.mf]
2432: fntnum0 current font is amr10 
[, and it will ask you to try again.]
2472: pop 
level 1:(h=0,v=22060238,w=0,x=0,y=786432,z=805456,hh=0,vv=1118) 
2473: y0 786432 v:=22060238+786432=22846670, vv:=1158 
2474: push 
level 1:(h=0,v=22846670,w=0,x=0,y=786432,z=805456,hh=0,vv=1158) 
[Just hit]
2486: push 
level 2:(h=2206726,v=22846670,w=191497,x=0,y=786432,z=805456,hh=111,vv=1158) 
[ ]
2488: fntdef1 12: amsy10---loaded at size 655360 DVI units 
2510: fntnum12 current font is amsy10 
[h]
2512: fntnum0 current font is amr10 
[return]
2519: fntnum12 current font is amsy10 
[i]
2521: pop 
level 2:(h=2206726,v=22846670,w=191497,x=0,y=786432,z=805456,hh=111,vv=1158) 
[ ]
2526: fntnum0 current font is amr10 
[this time; you'll see that you had better give the name of a real]
2603: pop 
level 1:(h=0,v=22846670,w=0,x=0,y=786432,z=805456,hh=0,vv=1158) 
2604: y0 786432 v:=22846670+786432=23633102, vv:=1198 
2605: push 
level 1:(h=0,v=23633102,w=0,x=0,y=786432,z=805456,hh=0,vv=1198) 
2606: setchar12 h:=0+364088=364088, hh:=18 
[le. So type `]
2632: fntnum29 current font is amtt10 
[badio]
2638: fntnum0 current font is amr10 
[' and wait for ]
2655: fnt1 72 current font is manual 
[METAFONT ]
2672: fntnum0 current font is amr10 
[to ]
2676: setchar12 h:=13936464+364088=14300552, hh:=724 
[nd one of the ]
2691: fntdef1 33: amsl10---loaded at size 655360 DVI units 
2713: fntnum33 current font is amsl10 
[faux pas ]
2726: fntnum0 current font is amr10 
[in that]
2734: pop 
level 1:(h=0,v=23633102,w=0,x=0,y=786432,z=805456,hh=0,vv=1198) 
2735: y0 786432 v:=23633102+786432=24419534, vv:=1237 
2736: push 
level 1:(h=0,v=24419534,w=0,x=0,y=786432,z=805456,hh=0,vv=1237) 
[messed-up text.]
2755: pop 
level 1:(h=0,v=24419534,w=0,x=0,y=786432,z=805456,hh=0,vv=1237) 
2756: z0 805456 v:=24419534+805456=25224990, vv:=1278 
2757: push 
level 1:(h=0,v=25224990,w=0,x=0,y=786432,z=805456,hh=0,vv=1278) 
[ Ah yes, the machine will soon stop, after typing something like this:]
2843: pop 
level 1:(h=0,v=25224990,w=0,x=0,y=786432,z=805456,hh=0,vv=1278) 
2844: down3 5762343 v:=25224990+5762343=30987333, vv:=1570 
2848: push 
level 1:(h=0,v=30987333,w=0,x=0,y=786432,z=805456,hh=0,vv=1570) 
2849: push 
level 2:(h=0,v=30987333,w=0,x=0,y=786432,z=805456,hh=0,vv=1570) 
2850: down3 -4718592 v:=30987333-4718592=26268741, vv:=1331 
2854: push 
level 3:(h=0,v=26268741,w=0,x=0,y=786432,z=805456,hh=0,vv=1331) 
[ ]
2859: fntnum29 current font is amtt10 
[>> mode.setup]
2876: pop 
level 3:(h=0,v=26268741,w=0,x=0,y=786432,z=805456,hh=0,vv=1331) 
2877: y0 786432 v:=26268741+786432=27055173, vv:=1371 
2878: push 
level 3:(h=0,v=27055173,w=0,x=0,y=786432,z=805456,hh=0,vv=1371) 
[ ! Isolated expression.]
2908: pop 
level 3:(h=0,v=27055173,w=0,x=0,y=786432,z=805456,hh=0,vv=1371) 
2909: y0 786432 v:=27055173+786432=27841605, vv:=1411 
2910: push 
level 3:(h=0,v=27841605,w=0,x=0,y=786432,z=805456,hh=0,vv=1411) 
[ <to be read again>]
2936: pop 
level 3:(h=0,v=27841605,w=0,x=0,y=786432,z=805456,hh=0,vv=1411) 
2937: y0 786432 v:=27841605+786432=28628037, vv:=1451 
2938: push 
level 3:(h=0,v=28628037,w=0,x=0,y=786432,z=805456,hh=0,vv=1451) 
[ ;]
2945: pop 
level 3:(h=0,v=28628037,w=0,x=0,y=786432,z=805456,hh=0,vv=1451) 
2946: y0 786432 v:=28628037+786432=29414469, vv:=1491 
2947: push 
level 3:(h=0,v=29414469,w=0,x=0,y=786432,z=805456,hh=0,vv=1491) 
[ l.1 mode setup;]
2970: pop 
level 3:(h=0,v=29414469,w=0,x=0,y=786432,z=805456,hh=0,vv=1491) 
2971: y0 786432 v:=29414469+786432=30200901, vv:=1530 
2972: push 
level 3:(h=0,v=30200901,w=0,x=0,y=786432,z=805456,hh=0,vv=1530) 
[ % an intentional error!]
3003: pop 
level 3:(h=0,v=30200901,w=0,x=0,y=786432,z=805456,hh=0,vv=1530) 
3004: y0 786432 v:=30200901+786432=30987333, vv:=1570 
3005: push 
level 3:(h=0,v=30987333,w=0,x=0,y=786432,z=805456,hh=0,vv=1570) 
[ ?]
3011: pop 
level 3:(h=0,v=30987333,w=0,x=0,y=786432,z=805456,hh=0,vv=1570) 
3012: pop 
level 2:(h=0,v=30987333,w=0,x=0,y=786432,z=805456,hh=0,vv=1570) 
3013: pop 
level 1:(h=0,v=30987333,w=0,x=0,y=786432,z=805456,hh=0,vv=1570) 
3014: down3 1236719 v:=30987333+1236719=32224052, vv:=1633 
3018: push 
level 1:(h=0,v=32224052,w=0,x=0,y=786432,z=805456,hh=0,vv=1633) 
3019: fnt1 72 current font is manual 
[METAFONT ]
3039: fntnum0 current font is amr10 
[begins its error messages with `]
3075: fntnum29 current font is amtt10 
[!]
3077: fntnum0 current font is amr10 
[', and it sometimes precedes them]
3114: pop 
level 1:(h=0,v=32224052,w=0,x=0,y=786432,z=805456,hh=0,vv=1633) 
3115: y0 786432 v:=32224052+786432=33010484, vv:=1673 
3116: push 
level 1:(h=0,v=33010484,w=0,x=0,y=786432,z=805456,hh=0,vv=1673) 
[with one or two related mathematical expressions that are displayed on lines]
3210: pop 
level 1:(h=0,v=33010484,w=0,x=0,y=786432,z=805456,hh=0,vv=1673) 
3211: y0 786432 v:=33010484+786432=33796916, vv:=1713 
3212: push 
level 1:(h=0,v=33796916,w=0,x=0,y=786432,z=805456,hh=0,vv=1713) 
[starting with `]
3231: fntnum29 current font is amtt10 
[>>]
3234: fntnum0 current font is amr10 
['. Each error message is also followed by lines of context that]
3308: pop 
level 1:(h=0,v=33796916,w=0,x=0,y=786432,z=805456,hh=0,vv=1713) 
3309: y0 786432 v:=33796916+786432=34583348, vv:=1752 
3310: push 
level 1:(h=0,v=34583348,w=0,x=0,y=786432,z=805456,hh=0,vv=1752) 
[show what the computer was reading at the time of the error. Such context lin]
[es]
3402: pop 
level 1:(h=0,v=34583348,w=0,x=0,y=786432,z=805456,hh=0,vv=1752) 
3403: y0 786432 v:=34583348+786432=35369780, vv:=1792 
3404: push 
level 1:(h=0,v=35369780,w=0,x=0,y=786432,z=805456,hh=0,vv=1792) 
[occur in pairs; the top line of the pair (e.g., `]
3466: fntnum29 current font is amtt10 
[mode setup;]
3478: fntnum0 current font is amr10 
[' ) shows what ]
3500: fnt1 72 current font is manual 
[META]
3509: fntnum0 current font is amr10 
[-]
3511: pop 
level 1:(h=0,v=35369780,w=0,x=0,y=786432,z=805456,hh=0,vv=1792) 
3512: y0 786432 v:=35369780+786432=36156212, vv:=1832 
3513: push 
level 1:(h=0,v=36156212,w=0,x=0,y=786432,z=805456,hh=0,vv=1832) 
3514: fnt1 72 current font is manual 
[FONT ]
3527: fntnum0 current font is amr10 
[has looked at so far, and where it came from (`]
3584: fntnum29 current font is amtt10 
[l.1]
3588: fntnum0 current font is amr10 
[', i.e., line number 1);]
3623: pop 
level 1:(h=0,v=36156212,w=0,x=0,y=786432,z=805456,hh=0,vv=1832) 
3624: y0 786432 v:=36156212+786432=36942644, vv:=1872 
3625: push 
level 1:(h=0,v=36942644,w=0,x=0,y=786432,z=805456,hh=0,vv=1872) 
[the bottom line (here `]
3655: fntnum29 current font is amtt10 
[% an intentional error!]
3679: fntnum0 current font is amr10 
[' ) shows what ]
3704: fnt1 72 current font is manual 
[METAFONT ]
3721: fntnum0 current font is amr10 
[has]
3725: pop 
level 1:(h=0,v=36942644,w=0,x=0,y=786432,z=805456,hh=0,vv=1872) 
3726: pop 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
3727: eop 
 
3728: beginning of page 812 
3773: down3 2359296 v:=0+2359296=2359296, vv:=120 
3777: push 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
3778: down3 -1703936 v:=2359296-1703936=655360, vv:=33 
3782: push 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
3783: push 
level 2:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
[ ]
3788: fntnum23 current font is ambx10 
[812]
3792: pop 
level 2:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
3793: fntnum36 current font is amti10 
[Experimental Pages for The T]
3829: push 
level 2:(h=8708990,v=655360,w=234473,x=-33497,y=0,z=0,hh=442,vv=33) 
3834: down3 141084 v:=655360+141084=796444, vv:=40 
[E]
3839: pop 
level 2:(h=8708990,v=655360,w=234473,x=-33497,y=0,z=0,hh=442,vv=33) 
[ Xbook]
3851: pop 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
3852: pop 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
3853: down4 34603008 v:=2359296+34603008=36962304, vv:=1873 
3858: push 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
3859: down4 -34603008 v:=36962304-34603008=2359296, vv:=120 
3864: push 
level 1:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
3865: push 
level 2:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
3866: down3 4325376 v:=2359296+4325376=6684672, vv:=339 
3870: push 
level 3:(h=0,v=6684672,w=0,x=0,y=0,z=0,hh=0,vv=339) 
3871: down3 -3670016 v:=6684672-3670016=3014656, vv:=153 
3875: push 
level 4:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
[ ]
3881: fntnum3 current font is amr7 
[transcript]
3892: pop 
level 4:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
3893: y3 524288 v:=3014656+524288=3538944, vv:=179 
3897: push 
level 4:(h=0,v=3538944,w=0,x=0,y=524288,z=0,hh=0,vv=179) 
[ log ]
3910: setchar12 h:=25282330+320398=25602728, hh:=1297 
[le]
3913: pop 
level 4:(h=0,v=3538944,w=0,x=0,y=524288,z=0,hh=0,vv=179) 
3914: y0 524288 v:=3538944+524288=4063232, vv:=206 
3915: push 
level 4:(h=0,v=4063232,w=0,x=0,y=524288,z=0,hh=0,vv=206) 
[ ?]
3922: pop 
level 4:(h=0,v=4063232,w=0,x=0,y=524288,z=0,hh=0,vv=206) 
3923: y0 524288 v:=4063232+524288=4587520, vv:=232 
3924: push 
level 4:(h=0,v=4587520,w=0,x=0,y=524288,z=0,hh=0,vv=232) 
[ inserting text online]
3954: pop 
level 4:(h=0,v=4587520,w=0,x=0,y=524288,z=0,hh=0,vv=232) 
3955: y0 524288 v:=4587520+524288=5111808, vv:=259 
3956: push 
level 4:(h=0,v=5111808,w=0,x=0,y=524288,z=0,hh=0,vv=259) 
[ online interaction, see interaction]
4004: pop 
level 4:(h=0,v=5111808,w=0,x=0,y=524288,z=0,hh=0,vv=259) 
4005: y0 524288 v:=5111808+524288=5636096, vv:=286 
4006: push 
level 4:(h=0,v=5636096,w=0,x=0,y=524288,z=0,hh=0,vv=286) 
[ interacting with MF]
4037: pop 
level 4:(h=0,v=5636096,w=0,x=0,y=524288,z=0,hh=0,vv=286) 
4038: y0 524288 v:=5636096+524288=6160384, vv:=312 
4039: push 
level 4:(h=0,v=6160384,w=0,x=0,y=524288,z=0,hh=0,vv=312) 
[ tokens]
4054: pop 
level 4:(h=0,v=6160384,w=0,x=0,y=524288,z=0,hh=0,vv=312) 
4055: y0 524288 v:=6160384+524288=6684672, vv:=339 
4056: push 
level 4:(h=0,v=6684672,w=0,x=0,y=524288,z=0,hh=0,vv=339) 
[ deleting tokens]
4083: pop 
level 4:(h=0,v=6684672,w=0,x=0,y=524288,z=0,hh=0,vv=339) 
4084: pop 
level 3:(h=0,v=6684672,w=0,x=0,y=0,z=0,hh=0,vv=339) 
4085: pop 
level 2:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
4086: pop 
level 1:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
4087: down3 655360 v:=2359296+655360=3014656, vv:=153 
4091: push 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
4092: fntnum0 current font is amr10 
[yet to read. In this case there are two pairs of context lines; the top pair ]
[refers]
4191: pop 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
4192: y3 786432 v:=3014656+786432=3801088, vv:=193 
4196: push 
level 1:(h=0,v=3801088,w=0,x=0,y=786432,z=0,hh=0,vv=193) 
[to a semicolon that ]
4220: fnt1 72 current font is manual 
[METAFONT ]
4237: fntnum0 current font is amr10 
[has read once but will be reading again, because]
4293: pop 
level 1:(h=0,v=3801088,w=0,x=0,y=786432,z=0,hh=0,vv=193) 
4294: y0 786432 v:=3801088+786432=4587520, vv:=232 
4295: push 
level 1:(h=0,v=4587520,w=0,x=0,y=786432,z=0,hh=0,vv=232) 
[it didn't belong with the preceding material.]
4347: pop 
level 1:(h=0,v=4587520,w=0,x=0,y=786432,z=0,hh=0,vv=232) 
4348: y0 786432 v:=4587520+786432=5373952, vv:=272 
4349: push 
level 1:(h=0,v=5373952,w=0,x=0,y=786432,z=0,hh=0,vv=272) 
[ You don't have to take out pencil and paper in order to write down the]
4448: pop 
level 1:(h=0,v=5373952,w=0,x=0,y=786432,z=0,hh=0,vv=272) 
4449: y0 786432 v:=5373952+786432=6160384, vv:=312 
4450: push 
level 1:(h=0,v=6160384,w=0,x=0,y=786432,z=0,hh=0,vv=312) 
[error messages that you get before they disappear from view, since ]
4531: fnt1 72 current font is manual 
[METAFONT]
4547: pop 
level 1:(h=0,v=6160384,w=0,x=0,y=786432,z=0,hh=0,vv=312) 
4548: y0 786432 v:=6160384+786432=6946816, vv:=352 
4549: push 
level 1:(h=0,v=6946816,w=0,x=0,y=786432,z=0,hh=0,vv=352) 
4550: fntnum0 current font is amr10 
[always writes a \transcript" or \log ]
4595: setchar12 h:=10899587+364088=11263675, hh:=570 
[le" that records what happened during]
4636: pop 
level 1:(h=0,v=6946816,w=0,x=0,y=786432,z=0,hh=0,vv=352) 
4637: y0 786432 v:=6946816+786432=7733248, vv:=392 
4638: push 
level 1:(h=0,v=7733248,w=0,x=0,y=786432,z=0,hh=0,vv=392) 
[each session. For example, you should now have a ]
4708: setchar12 h:=14624976+364088=14989064, hh:=759 
[le called ]
4719: fntnum29 current font is amtt10 
[io.log ]
4727: fntnum0 current font is amr10 
[containing]
4739: pop 
level 1:(h=0,v=7733248,w=0,x=0,y=786432,z=0,hh=0,vv=392) 
4740: y0 786432 v:=7733248+786432=8519680, vv:=432 
4741: push 
level 1:(h=0,v=8519680,w=0,x=0,y=786432,z=0,hh=0,vv=432) 
[the transcript of Experiment 4, as well as a ]
4800: setchar12 h:=13278226+364088=13642314, hh:=691 
[le ]
4804: fntnum29 current font is amtt10 
[mfput.log ]
4815: fntnum0 current font is amr10 
[that contains the]
4834: pop 
level 1:(h=0,v=8519680,w=0,x=0,y=786432,z=0,hh=0,vv=432) 
4835: y0 786432 v:=8519680+786432=9306112, vv:=472 
4836: push 
level 1:(h=0,v=9306112,w=0,x=0,y=786432,z=0,hh=0,vv=472) 
[transcript of Experiment 1. (The transcript of Experiment 2 was probably]
4926: pop 
level 1:(h=0,v=9306112,w=0,x=0,y=786432,z=0,hh=0,vv=472) 
4927: y0 786432 v:=9306112+786432=10092544, vv:=511 
4928: push 
level 1:(h=0,v=10092544,w=0,x=0,y=786432,z=0,hh=0,vv=511) 
[overwritten when you did Experiment 3, and again when you did Experiment 4,]
5026: pop 
level 1:(h=0,v=10092544,w=0,x=0,y=786432,z=0,hh=0,vv=511) 
5027: y0 786432 v:=10092544+786432=10878976, vv:=551 
5028: push 
level 1:(h=0,v=10878976,w=0,x=0,y=786432,z=0,hh=0,vv=551) 
[because all three transcripts were called ]
5080: fntnum29 current font is amtt10 
[io.log]
5087: fntnum0 current font is amr10 
[.) At the end of Experiment 5]
5125: pop 
level 1:(h=0,v=10878976,w=0,x=0,y=786432,z=0,hh=0,vv=551) 
5126: y0 786432 v:=10878976+786432=11665408, vv:=591 
5127: push 
level 1:(h=0,v=11665408,w=0,x=0,y=786432,z=0,hh=0,vv=591) 
[you'll have a ]
5150: setchar12 h:=3832362+364088=4196450, hh:=212 
[le ]
5154: fntnum29 current font is amtt10 
[badio.log ]
5165: fntnum0 current font is amr10 
[that will serve as a helpful reminder of what errors]
5219: pop 
level 1:(h=0,v=11665408,w=0,x=0,y=786432,z=0,hh=0,vv=591) 
5220: y0 786432 v:=11665408+786432=12451840, vv:=631 
5221: push 
level 1:(h=0,v=12451840,w=0,x=0,y=786432,z=0,hh=0,vv=631) 
[need to be ]
5239: setchar12 h:=3222182+364088=3586270, hh:=181 
[xed up.]
5247: pop 
level 1:(h=0,v=12451840,w=0,x=0,y=786432,z=0,hh=0,vv=631) 
5248: y0 786432 v:=12451840+786432=13238272, vv:=671 
5249: push 
level 1:(h=0,v=13238272,w=0,x=0,y=786432,z=0,hh=0,vv=671) 
[ The `]
5262: fntnum29 current font is amtt10 
[?]
5264: fntnum0 current font is amr10 
[' that appears after the context display means that ]
5327: fnt1 72 current font is manual 
[METAFONT]
5343: pop 
level 1:(h=0,v=13238272,w=0,x=0,y=786432,z=0,hh=0,vv=671) 
5344: y0 786432 v:=13238272+786432=14024704, vv:=711 
5345: push 
level 1:(h=0,v=14024704,w=0,x=0,y=786432,z=0,hh=0,vv=711) 
5346: fntnum0 current font is amr10 
[wants advice about what to do next. If you've never seen an error message]
5441: pop 
level 1:(h=0,v=14024704,w=0,x=0,y=786432,z=0,hh=0,vv=711) 
5442: y0 786432 v:=14024704+786432=14811136, vv:=751 
5443: push 
level 1:(h=0,v=14811136,w=0,x=0,y=786432,z=0,hh=0,vv=751) 
[before, or if you've forgotten what sort of response is expected, you can typ]
[e `]
5552: fntnum29 current font is amtt10 
[?]
5554: fntnum0 current font is amr10 
[']
5556: pop 
level 1:(h=0,v=14811136,w=0,x=0,y=786432,z=0,hh=0,vv=751) 
5557: y0 786432 v:=14811136+786432=15597568, vv:=790 
5558: push 
level 1:(h=0,v=15597568,w=0,x=0,y=786432,z=0,hh=0,vv=790) 
[now (go ahead and try it!); ]
5593: fnt1 72 current font is manual 
[METAFONT ]
5610: fntnum0 current font is amr10 
[will respond as follows:]
5639: pop 
level 1:(h=0,v=15597568,w=0,x=0,y=786432,z=0,hh=0,vv=790) 
5640: down3 4155619 v:=15597568+4155619=19753187, vv:=1001 
5644: push 
level 1:(h=0,v=19753187,w=0,x=0,y=786432,z=0,hh=0,vv=1001) 
5645: push 
level 2:(h=0,v=19753187,w=0,x=0,y=786432,z=0,hh=0,vv=1001) 
5646: down3 -3145728 v:=19753187-3145728=16607459, vv:=842 
5650: push 
level 3:(h=0,v=16607459,w=0,x=0,y=786432,z=0,hh=0,vv=842) 
[ ]
5655: fntnum29 current font is amtt10 
[Type <return> to proceed, S to scroll future error messages,]
5719: pop 
level 3:(h=0,v=16607459,w=0,x=0,y=786432,z=0,hh=0,vv=842) 
5720: y0 786432 v:=16607459+786432=17393891, vv:=881 
5721: push 
level 3:(h=0,v=17393891,w=0,x=0,y=786432,z=0,hh=0,vv=881) 
[ R to run without stopping, Q to run quietly,]
5773: pop 
level 3:(h=0,v=17393891,w=0,x=0,y=786432,z=0,hh=0,vv=881) 
5774: y0 786432 v:=17393891+786432=18180323, vv:=921 
5775: push 
level 3:(h=0,v=18180323,w=0,x=0,y=786432,z=0,hh=0,vv=921) 
[ I to insert something, E to edit your file,]
5826: pop 
level 3:(h=0,v=18180323,w=0,x=0,y=786432,z=0,hh=0,vv=921) 
5827: y0 786432 v:=18180323+786432=18966755, vv:=961 
5828: push 
level 3:(h=0,v=18966755,w=0,x=0,y=786432,z=0,hh=0,vv=961) 
[ 1 or ... or 9 to ignore the next 1 to 9 tokens of input,]
5892: pop 
level 3:(h=0,v=18966755,w=0,x=0,y=786432,z=0,hh=0,vv=961) 
5893: y0 786432 v:=18966755+786432=19753187, vv:=1001 
5894: push 
level 3:(h=0,v=19753187,w=0,x=0,y=786432,z=0,hh=0,vv=1001) 
[ H for help, X to quit.]
5924: pop 
level 3:(h=0,v=19753187,w=0,x=0,y=786432,z=0,hh=0,vv=1001) 
5925: pop 
level 2:(h=0,v=19753187,w=0,x=0,y=786432,z=0,hh=0,vv=1001) 
5926: pop 
level 1:(h=0,v=19753187,w=0,x=0,y=786432,z=0,hh=0,vv=1001) 
5927: down3 1166450 v:=19753187+1166450=20919637, vv:=1060 
5931: push 
level 1:(h=0,v=20919637,w=0,x=0,y=786432,z=0,hh=0,vv=1060) 
5932: fntnum0 current font is amr10 
[This is your menu of options. You may choose to continue in various ways:]
6033: pop 
level 1:(h=0,v=20919637,w=0,x=0,y=786432,z=0,hh=0,vv=1060) 
6034: z3 969842 v:=20919637+969842=21889479, vv:=1109 
6038: push 
level 1:(h=0,v=21889479,w=0,x=0,y=786432,z=969842,hh=0,vv=1109) 
6039: push 
level 2:(h=0,v=21889479,w=0,x=0,y=786432,z=969842,hh=0,vv=1109) 
[ 1.]
6046: pop 
level 2:(h=0,v=21889479,w=0,x=0,y=786432,z=969842,hh=0,vv=1109) 
[ Simply type]
6071: push 
level 2:(h=5848033,v=21889479,w=248352,x=18204,y=786432,z=969842,hh=297,vv=1109) 
[ ]
6073: fntnum12 current font is amsy10 
[h]
6075: fntnum0 current font is amr10 
[return]
6082: fntnum12 current font is amsy10 
[i]
6084: pop 
level 2:(h=5848033,v=21889479,w=248352,x=18204,y=786432,z=969842,hh=297,vv=1109) 
[ ]
6089: fntnum0 current font is amr10 
[. ]
6095: fnt1 72 current font is manual 
[METAFONT ]
6112: fntnum0 current font is amr10 
[will resume its processing, after at-]
6154: pop 
level 1:(h=0,v=21889479,w=0,x=0,y=786432,z=969842,hh=0,vv=1109) 
6155: y0 786432 v:=21889479+786432=22675911, vv:=1149 
6156: push 
level 1:(h=0,v=22675911,w=0,x=0,y=786432,z=969842,hh=0,vv=1149) 
[ tempting to recover from the error as best it can.]
6224: pop 
level 1:(h=0,v=22675911,w=0,x=0,y=786432,z=969842,hh=0,vv=1149) 
6225: z0 969842 v:=22675911+969842=23645753, vv:=1198 
6226: push 
level 1:(h=0,v=23645753,w=0,x=0,y=786432,z=969842,hh=0,vv=1198) 
6227: push 
level 2:(h=0,v=23645753,w=0,x=0,y=786432,z=969842,hh=0,vv=1198) 
[ 2.]
6234: pop 
level 2:(h=0,v=23645753,w=0,x=0,y=786432,z=969842,hh=0,vv=1198) 
[ Type `]
6254: fntnum29 current font is amtt10 
[S]
6256: fntnum0 current font is amr10 
['. ]
6260: fnt1 72 current font is manual 
[METAFONT ]
6277: fntnum0 current font is amr10 
[will proceed without pausing for instructions if]
6327: pop 
level 1:(h=0,v=23645753,w=0,x=0,y=786432,z=969842,hh=0,vv=1198) 
6328: y0 786432 v:=23645753+786432=24432185, vv:=1238 
6329: push 
level 1:(h=0,v=24432185,w=0,x=0,y=786432,z=969842,hh=0,vv=1238) 
[ further errors arise. Subsequent error messages will ]
6396: setchar13 h:=17963008+364088=18327096, hh:=928 
[ash by on your]
6413: pop 
level 1:(h=0,v=24432185,w=0,x=0,y=786432,z=969842,hh=0,vv=1238) 
6414: y0 786432 v:=24432185+786432=25218617, vv:=1278 
6415: push 
level 1:(h=0,v=25218617,w=0,x=0,y=786432,z=969842,hh=0,vv=1278) 
[ terminal, possibly faster than you can read them, and they will appear]
6505: pop 
level 1:(h=0,v=25218617,w=0,x=0,y=786432,z=969842,hh=0,vv=1278) 
6506: y0 786432 v:=25218617+786432=26005049, vv:=1318 
6507: push 
level 1:(h=0,v=26005049,w=0,x=0,y=786432,z=969842,hh=0,vv=1318) 
[ in your log ]
6530: setchar12 h:=5865701+364088=6229789, hh:=315 
[le where you can scrutinize them at your leisure. Thus,]
6592: pop 
level 1:(h=0,v=26005049,w=0,x=0,y=786432,z=969842,hh=0,vv=1318) 
6593: y0 786432 v:=26005049+786432=26791481, vv:=1358 
6594: push 
level 1:(h=0,v=26791481,w=0,x=0,y=786432,z=969842,hh=0,vv=1358) 
[ `]
6600: fntnum29 current font is amtt10 
[S]
6602: fntnum0 current font is amr10 
[' is sort of like typing]
6634: push 
level 2:(h=9031669,v=26791481,w=218453,x=-18205,y=786432,z=969842,hh=457,vv=1358) 
[ ]
6636: fntnum12 current font is amsy10 
[h]
6638: fntnum0 current font is amr10 
[return]
6645: fntnum12 current font is amsy10 
[i]
6647: pop 
level 2:(h=9031669,v=26791481,w=218453,x=-18205,y=786432,z=969842,hh=457,vv=1358) 
[ ]
6652: fntnum0 current font is amr10 
[to every message.]
6671: pop 
level 1:(h=0,v=26791481,w=0,x=0,y=786432,z=969842,hh=0,vv=1358) 
6672: z0 969842 v:=26791481+969842=27761323, vv:=1407 
6673: push 
level 1:(h=0,v=27761323,w=0,x=0,y=786432,z=969842,hh=0,vv=1407) 
6674: push 
level 2:(h=0,v=27761323,w=0,x=0,y=786432,z=969842,hh=0,vv=1407) 
[ 3.]
6681: pop 
level 2:(h=0,v=27761323,w=0,x=0,y=786432,z=969842,hh=0,vv=1407) 
[ Type `]
6701: fntnum29 current font is amtt10 
[R]
6703: fntnum0 current font is amr10 
['. This is like `]
6722: fntnum29 current font is amtt10 
[S]
6724: fntnum0 current font is amr10 
[' but even stronger, since it tells ]
6768: fnt1 72 current font is manual 
[METAFONT ]
6785: fntnum0 current font is amr10 
[not]
6789: pop 
level 1:(h=0,v=27761323,w=0,x=0,y=786432,z=969842,hh=0,vv=1407) 
6790: y0 786432 v:=27761323+786432=28547755, vv:=1447 
6791: push 
level 1:(h=0,v=28547755,w=0,x=0,y=786432,z=969842,hh=0,vv=1447) 
[ to stop for any reason, not even if a ]
6841: setchar12 h:=12860516+364088=13224604, hh:=670 
[le name can't be found.]
6868: pop 
level 1:(h=0,v=28547755,w=0,x=0,y=786432,z=969842,hh=0,vv=1447) 
6869: z0 969842 v:=28547755+969842=29517597, vv:=1496 
6870: push 
level 1:(h=0,v=29517597,w=0,x=0,y=786432,z=969842,hh=0,vv=1496) 
6871: push 
level 2:(h=0,v=29517597,w=0,x=0,y=786432,z=969842,hh=0,vv=1496) 
[ 4.]
6878: pop 
level 2:(h=0,v=29517597,w=0,x=0,y=786432,z=969842,hh=0,vv=1496) 
[ Type `]
6898: fntnum29 current font is amtt10 
[Q]
6900: fntnum0 current font is amr10 
['. This is like `]
6919: fntnum29 current font is amtt10 
[R]
6921: fntnum0 current font is amr10 
[' but even more so, since it tells ]
6964: fnt1 72 current font is manual 
[METAFONT ]
6981: fntnum0 current font is amr10 
[not]
6985: pop 
level 1:(h=0,v=29517597,w=0,x=0,y=786432,z=969842,hh=0,vv=1496) 
6986: y0 786432 v:=29517597+786432=30304029, vv:=1536 
6987: push 
level 1:(h=0,v=30304029,w=0,x=0,y=786432,z=969842,hh=0,vv=1536) 
[ only to proceed without stopping but also to suppress all further output]
7070: pop 
level 1:(h=0,v=30304029,w=0,x=0,y=786432,z=969842,hh=0,vv=1536) 
7071: y0 786432 v:=30304029+786432=31090461, vv:=1575 
7072: push 
level 1:(h=0,v=31090461,w=0,x=0,y=786432,z=969842,hh=0,vv=1575) 
[ to your terminal. It is a fast, but somewhat reckless, way to proceed]
7167: pop 
level 1:(h=0,v=31090461,w=0,x=0,y=786432,z=969842,hh=0,vv=1575) 
7168: y0 786432 v:=31090461+786432=31876893, vv:=1615 
7169: push 
level 1:(h=0,v=31876893,w=0,x=0,y=786432,z=969842,hh=0,vv=1615) 
[ (intended for running ]
7202: fnt1 72 current font is manual 
[METAFONT ]
7219: fntnum0 current font is amr10 
[with no operator in attendance).]
7255: pop 
level 1:(h=0,v=31876893,w=0,x=0,y=786432,z=969842,hh=0,vv=1615) 
7256: z0 969842 v:=31876893+969842=32846735, vv:=1664 
7257: push 
level 1:(h=0,v=32846735,w=0,x=0,y=786432,z=969842,hh=0,vv=1664) 
7258: push 
level 2:(h=0,v=32846735,w=0,x=0,y=786432,z=969842,hh=0,vv=1664) 
[ 5.]
7265: pop 
level 2:(h=0,v=32846735,w=0,x=0,y=786432,z=969842,hh=0,vv=1664) 
[ Type `]
7285: fntnum29 current font is amtt10 
[I]
7287: fntnum0 current font is amr10 
[', followed by some text that you want to insert. ]
7347: fnt1 72 current font is manual 
[METAFONT]
7363: pop 
level 1:(h=0,v=32846735,w=0,x=0,y=786432,z=969842,hh=0,vv=1664) 
7364: y0 786432 v:=32846735+786432=33633167, vv:=1704 
7365: push 
level 1:(h=0,v=33633167,w=0,x=0,y=786432,z=969842,hh=0,vv=1704) 
[ ]
7370: fntnum0 current font is amr10 
[will read this text before encountering what it would ordinarily see next.]
7455: pop 
level 1:(h=0,v=33633167,w=0,x=0,y=786432,z=969842,hh=0,vv=1704) 
7456: z0 969842 v:=33633167+969842=34603009, vv:=1753 
7457: push 
level 1:(h=0,v=34603009,w=0,x=0,y=786432,z=969842,hh=0,vv=1753) 
7458: push 
level 2:(h=0,v=34603009,w=0,x=0,y=786432,z=969842,hh=0,vv=1753) 
[ 6.]
7465: pop 
level 2:(h=0,v=34603009,w=0,x=0,y=786432,z=969842,hh=0,vv=1753) 
[ Type a small number (less than 100). ]
7524: fnt1 72 current font is manual 
[METAFONT ]
7541: fntnum0 current font is amr10 
[will delete this many]
7564: pop 
level 1:(h=0,v=34603009,w=0,x=0,y=786432,z=969842,hh=0,vv=1753) 
7565: y0 786432 v:=34603009+786432=35389441, vv:=1793 
7566: push 
level 1:(h=0,v=35389441,w=0,x=0,y=786432,z=969842,hh=0,vv=1793) 
[ tokens from whatever it is about to read next, and it will pause again]
7654: pop 
level 1:(h=0,v=35389441,w=0,x=0,y=786432,z=969842,hh=0,vv=1793) 
7655: y0 786432 v:=35389441+786432=36175873, vv:=1833 
7656: push 
level 1:(h=0,v=36175873,w=0,x=0,y=786432,z=969842,hh=0,vv=1833) 
[ to give you another chance to look things over. (A \token" is a name,]
7747: pop 
level 1:(h=0,v=36175873,w=0,x=0,y=786432,z=969842,hh=0,vv=1833) 
7748: y0 786432 v:=36175873+786432=36962305, vv:=1873 
7749: push 
level 1:(h=0,v=36962305,w=0,x=0,y=786432,z=969842,hh=0,vv=1873) 
[ number, or symbol that ]
7795: fnt1 72 current font is manual 
[METAFONT ]
7812: fntnum0 current font is amr10 
[reads as a unit; e.g., `]
7843: fntnum29 current font is amtt10 
[mode]
7848: fntnum0 current font is amr10 
[' and]
7854: pop 
level 1:(h=0,v=36962305,w=0,x=0,y=786432,z=969842,hh=0,vv=1873) 
7855: pop 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
7856: eop 
 
7857: beginning of page 813 
7902: down3 2359296 v:=0+2359296=2359296, vv:=120 
7906: push 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
7907: down3 -1703936 v:=2359296-1703936=655360, vv:=33 
7911: push 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
[ ]
7917: fntnum36 current font is amti10 
[Experimental Pages for The T]
7953: push 
level 2:(h=20796027,v=655360,w=234473,x=-33497,y=0,z=0,hh=1054,vv=33) 
7958: down3 141084 v:=655360+141084=796444, vv:=40 
[E]
7963: pop 
level 2:(h=20796027,v=655360,w=234473,x=-33497,y=0,z=0,hh=1054,vv=33) 
[ Xbook]
7975: push 
level 2:(h=22735986,v=655360,w=234473,x=-33497,y=0,z=0,hh=1151,vv=33) 
[ ]
7980: fntnum23 current font is ambx10 
[813]
7984: pop 
level 2:(h=22735986,v=655360,w=234473,x=-33497,y=0,z=0,hh=1151,vv=33) 
7985: pop 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
7986: pop 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
7987: down4 34603008 v:=2359296+34603008=36962304, vv:=1873 
7992: push 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
7993: down4 -34603008 v:=36962304-34603008=2359296, vv:=120 
7998: push 
level 1:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
7999: push 
level 2:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
8000: down3 1703936 v:=2359296+1703936=4063232, vv:=206 
8004: push 
level 3:(h=0,v=4063232,w=0,x=0,y=0,z=0,hh=0,vv=206) 
8005: down3 -1048576 v:=4063232-1048576=3014656, vv:=153 
8009: push 
level 4:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
[ ]
8015: fntnum3 current font is amr7 
[help messages]
8032: pop 
level 4:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
8033: y3 524288 v:=3014656+524288=3538944, vv:=179 
8037: push 
level 4:(h=0,v=3538944,w=0,x=0,y=524288,z=0,hh=0,vv=179) 
[ percent]
8056: pop 
level 4:(h=0,v=3538944,w=0,x=0,y=524288,z=0,hh=0,vv=179) 
8057: y0 524288 v:=3538944+524288=4063232, vv:=206 
8058: push 
level 4:(h=0,v=4063232,w=0,x=0,y=524288,z=0,hh=0,vv=206) 
[ comments]
8075: pop 
level 4:(h=0,v=4063232,w=0,x=0,y=524288,z=0,hh=0,vv=206) 
8076: pop 
level 3:(h=0,v=4063232,w=0,x=0,y=0,z=0,hh=0,vv=206) 
8077: pop 
level 2:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
8078: pop 
level 1:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
8079: down3 655360 v:=2359296+655360=3014656, vv:=153 
8083: push 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
[ ]
8088: fntnum0 current font is amr10 
[`]
8090: fntnum29 current font is amtt10 
[setup]
8096: fntnum0 current font is amr10 
[' and `]
8107: fntnum29 current font is amtt10 
[;]
8109: fntnum0 current font is amr10 
[' are the ]
8123: setchar12 h:=8970632+364088=9334720, hh:=473 
[rst three tokens of ]
8147: fntnum29 current font is amtt10 
[badio.mf]
8156: fntnum0 current font is amr10 
[, but `]
8167: fntnum29 current font is amtt10 
[mode_setup]
8178: fntnum0 current font is amr10 
[']
8180: pop 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
8181: y3 786432 v:=3014656+786432=3801088, vv:=193 
8185: push 
level 1:(h=0,v=3801088,w=0,x=0,y=786432,z=0,hh=0,vv=193) 
[ is the ]
8200: setchar12 h:=4146970+364088=4511058, hh:=228 
[rst token of ]
8217: fntnum29 current font is amtt10 
[io.mf]
8223: fntnum0 current font is amr10 
[. Chapter xx explains this concept precisely.)]
8277: pop 
level 1:(h=0,v=3801088,w=0,x=0,y=786432,z=0,hh=0,vv=193) 
8278: down3 1026246 v:=3801088+1026246=4827334, vv:=245 
8282: push 
level 1:(h=0,v=4827334,w=0,x=0,y=786432,z=0,hh=0,vv=245) 
8283: push 
level 2:(h=0,v=4827334,w=0,x=0,y=786432,z=0,hh=0,vv=245) 
[ 7.]
8290: pop 
level 2:(h=0,v=4827334,w=0,x=0,y=786432,z=0,hh=0,vv=245) 
[ Type `]
8310: fntnum29 current font is amtt10 
[H]
8312: fntnum0 current font is amr10 
['. This is what you should do now and whenever you are faced]
8377: pop 
level 1:(h=0,v=4827334,w=0,x=0,y=786432,z=0,hh=0,vv=245) 
8378: y0 786432 v:=4827334+786432=5613766, vv:=284 
8379: push 
level 1:(h=0,v=5613766,w=0,x=0,y=786432,z=0,hh=0,vv=284) 
[ with an error message that you haven't seen for a while. ]
8452: fnt1 72 current font is manual 
[METAFONT]
8468: pop 
level 1:(h=0,v=5613766,w=0,x=0,y=786432,z=0,hh=0,vv=284) 
8469: y0 786432 v:=5613766+786432=6400198, vv:=324 
8470: push 
level 1:(h=0,v=6400198,w=0,x=0,y=786432,z=0,hh=0,vv=324) 
[ ]
8475: fntnum0 current font is amr10 
[has two messages built in for each perceived error: a formal one and]
8559: pop 
level 1:(h=0,v=6400198,w=0,x=0,y=786432,z=0,hh=0,vv=324) 
8560: y0 786432 v:=6400198+786432=7186630, vv:=364 
8561: push 
level 1:(h=0,v=7186630,w=0,x=0,y=786432,z=0,hh=0,vv=364) 
[ an informal one. The formal message is printed ]
8622: setchar12 h:=16287613+364088=16651701, hh:=843 
[rst (e.g., `]
8638: fntnum29 current font is amtt10 
[! Isolated]
8649: pop 
level 1:(h=0,v=7186630,w=0,x=0,y=786432,z=0,hh=0,vv=364) 
8650: y0 786432 v:=7186630+786432=7973062, vv:=404 
8651: push 
level 1:(h=0,v=7973062,w=0,x=0,y=786432,z=0,hh=0,vv=404) 
[ expression.]
8667: fntnum0 current font is amr10 
[' ); the informal one is printed if you request more help]
8738: pop 
level 1:(h=0,v=7973062,w=0,x=0,y=786432,z=0,hh=0,vv=404) 
8739: y0 786432 v:=7973062+786432=8759494, vv:=444 
8740: push 
level 1:(h=0,v=8759494,w=0,x=0,y=786432,z=0,hh=0,vv=444) 
[ by typing `]
8763: fntnum29 current font is amtt10 
[H]
8765: fntnum0 current font is amr10 
[', and it also appears in your log ]
8805: setchar12 h:=16145911+364088=16509999, hh:=836 
[le if you are scrolling]
8830: pop 
level 1:(h=0,v=8759494,w=0,x=0,y=786432,z=0,hh=0,vv=444) 
8831: y0 786432 v:=8759494+786432=9545926, vv:=484 
8832: push 
level 1:(h=0,v=9545926,w=0,x=0,y=786432,z=0,hh=0,vv=484) 
[ error messages. The informal message tries to complement the formal]
8913: pop 
level 1:(h=0,v=9545926,w=0,x=0,y=786432,z=0,hh=0,vv=484) 
8914: y0 786432 v:=9545926+786432=10332358, vv:=524 
8915: push 
level 1:(h=0,v=10332358,w=0,x=0,y=786432,z=0,hh=0,vv=524) 
[ one by explaining what ]
8949: fnt1 72 current font is manual 
[METAFONT ]
8966: fntnum0 current font is amr10 
[thinks the trouble is, and often by]
9006: pop 
level 1:(h=0,v=10332358,w=0,x=0,y=786432,z=0,hh=0,vv=524) 
9007: y0 786432 v:=10332358+786432=11118790, vv:=563 
9008: push 
level 1:(h=0,v=11118790,w=0,x=0,y=786432,z=0,hh=0,vv=563) 
[ suggesting a strategy for recouping your losses.]
9067: pop 
level 1:(h=0,v=11118790,w=0,x=0,y=786432,z=0,hh=0,vv=563) 
9068: z3 1026246 v:=11118790+1026246=12145036, vv:=615 
9072: push 
level 1:(h=0,v=12145036,w=0,x=0,y=786432,z=1026246,hh=0,vv=615) 
9073: push 
level 2:(h=0,v=12145036,w=0,x=0,y=786432,z=1026246,hh=0,vv=615) 
[ 8.]
9080: pop 
level 2:(h=0,v=12145036,w=0,x=0,y=786432,z=1026246,hh=0,vv=615) 
[ Type `]
9100: fntnum29 current font is amtt10 
[X]
9102: fntnum0 current font is amr10 
['. This stands for \exit." It causes ]
9143: fnt1 72 current font is manual 
[METAFONT ]
9160: fntnum0 current font is amr10 
[to stop working]
9177: pop 
level 1:(h=0,v=12145036,w=0,x=0,y=786432,z=1026246,hh=0,vv=615) 
9178: y0 786432 v:=12145036+786432=12931468, vv:=655 
9179: push 
level 1:(h=0,v=12931468,w=0,x=0,y=786432,z=1026246,hh=0,vv=655) 
[ on your job, after putting the ]
9224: setchar12 h:=11107212+364088=11471300, hh:=581 
[nishing touches on your ]
9251: fntnum29 current font is amtt10 
[log ]
9256: fntnum0 current font is amr10 
9257: setchar12 h:=19772430+364088=20136518, hh:=1020 
[le and on]
9267: pop 
level 1:(h=0,v=12931468,w=0,x=0,y=786432,z=1026246,hh=0,vv=655) 
9268: y0 786432 v:=12931468+786432=13717900, vv:=695 
9269: push 
level 1:(h=0,v=13717900,w=0,x=0,y=786432,z=1026246,hh=0,vv=695) 
[ any characters that have already been output to your ]
9340: fntnum29 current font is amtt10 
[gf ]
9344: fntnum0 current font is amr10 
[and/or ]
9352: fntnum29 current font is amtt10 
[tfm]
9356: pop 
level 1:(h=0,v=13717900,w=0,x=0,y=786432,z=1026246,hh=0,vv=695) 
9357: y0 786432 v:=13717900+786432=14504332, vv:=735 
9358: push 
level 1:(h=0,v=14504332,w=0,x=0,y=786432,z=1026246,hh=0,vv=735) 
[ ]
9363: fntnum0 current font is amr10 
9364: setchar12 h:=2359296+364088=2723384, hh:=138 
[les. The current (incomplete) character will not be output.]
9437: pop 
level 1:(h=0,v=14504332,w=0,x=0,y=786432,z=1026246,hh=0,vv=735) 
9438: z0 1026246 v:=14504332+1026246=15530578, vv:=787 
9439: push 
level 1:(h=0,v=15530578,w=0,x=0,y=786432,z=1026246,hh=0,vv=787) 
9440: push 
level 2:(h=0,v=15530578,w=0,x=0,y=786432,z=1026246,hh=0,vv=787) 
[ 9.]
9447: pop 
level 2:(h=0,v=15530578,w=0,x=0,y=786432,z=1026246,hh=0,vv=787) 
[ Type `]
9467: fntnum29 current font is amtt10 
[E]
9469: fntnum0 current font is amr10 
['. This is like `]
9488: fntnum29 current font is amtt10 
[X]
9490: fntnum0 current font is amr10 
[', but it also prepares the computer to edit the]
9539: pop 
level 1:(h=0,v=15530578,w=0,x=0,y=786432,z=1026246,hh=0,vv=787) 
9540: y0 786432 v:=15530578+786432=16317010, vv:=827 
9541: push 
level 1:(h=0,v=16317010,w=0,x=0,y=786432,z=1026246,hh=0,vv=827) 
[ ]
9546: setchar12 h:=2359296+364088=2723384, hh:=138 
[le that ]
9558: fnt1 72 current font is manual 
[METAFONT ]
9575: fntnum0 current font is amr10 
[is currently reading, at the current position, so that]
9643: pop 
level 1:(h=0,v=16317010,w=0,x=0,y=786432,z=1026246,hh=0,vv=827) 
9644: y0 786432 v:=16317010+786432=17103442, vv:=867 
9645: push 
level 1:(h=0,v=17103442,w=0,x=0,y=786432,z=1026246,hh=0,vv=867) 
[ you can conveniently make a change before trying again.]
9719: pop 
level 1:(h=0,v=17103442,w=0,x=0,y=786432,z=1026246,hh=0,vv=867) 
9720: z0 1026246 v:=17103442+1026246=18129688, vv:=919 
9721: push 
level 1:(h=0,v=18129688,w=0,x=0,y=786432,z=1026246,hh=0,vv=919) 
[After you type `]
9748: fntnum29 current font is amtt10 
[H]
9750: fntnum0 current font is amr10 
[' (or `]
9761: fntnum29 current font is amtt10 
[h]
9763: fntnum0 current font is amr10 
[', which also works), you'll get a message that tries to ex-]
9833: pop 
level 1:(h=0,v=18129688,w=0,x=0,y=786432,z=1026246,hh=0,vv=919) 
9834: y0 786432 v:=18129688+786432=18916120, vv:=959 
9835: push 
level 1:(h=0,v=18916120,w=0,x=0,y=786432,z=1026246,hh=0,vv=959) 
[plain that the mathematical quantity just read by ]
9899: fnt1 72 current font is manual 
[METAFONT ]
9916: fntnum0 current font is amr10 
[(i.e., ]
9927: fntnum29 current font is amtt10 
[mode.setup]
9938: fntnum0 current font is amr10 
[)]
9940: pop 
level 1:(h=0,v=18916120,w=0,x=0,y=786432,z=1026246,hh=0,vv=959) 
9941: y0 786432 v:=18916120+786432=19702552, vv:=998 
9942: push 
level 1:(h=0,v=19702552,w=0,x=0,y=786432,z=1026246,hh=0,vv=998) 
[was not followed by `]
9973: fntnum29 current font is amtt10 
[=]
9975: fntnum0 current font is amr10 
[' or `]
9982: fntnum29 current font is amtt10 
[:=]
9985: fntnum0 current font is amr10 
[', so there was nothing for ]
10018: fnt1 72 current font is manual 
[METAFONT ]
10035: fntnum0 current font is amr10 
[to do with]
10046: pop 
level 1:(h=0,v=19702552,w=0,x=0,y=786432,z=1026246,hh=0,vv=998) 
10047: y0 786432 v:=19702552+786432=20488984, vv:=1038 
10048: push 
level 1:(h=0,v=20488984,w=0,x=0,y=786432,z=1026246,hh=0,vv=1038) 
[it. Chapter xx explains that a space between tokens (e.g., `]
10129: fntnum29 current font is amtt10 
[mode setup]
10140: fntnum0 current font is amr10 
[' ) is]
10150: pop 
level 1:(h=0,v=20488984,w=0,x=0,y=786432,z=1026246,hh=0,vv=1038) 
10151: y0 786432 v:=20488984+786432=21275416, vv:=1078 
10152: push 
level 1:(h=0,v=21275416,w=0,x=0,y=786432,z=1026246,hh=0,vv=1078) 
[equivalent to a period between tokens (e.g., `]
10226: fntnum29 current font is amtt10 
[mode.setup]
10237: fntnum0 current font is amr10 
[' ). The correct spelling]
10272: pop 
level 1:(h=0,v=21275416,w=0,x=0,y=786432,z=1026246,hh=0,vv=1078) 
10273: y0 786432 v:=21275416+786432=22061848, vv:=1118 
10274: push 
level 1:(h=0,v=22061848,w=0,x=0,y=786432,z=1026246,hh=0,vv=1118) 
[`]
10276: fntnum29 current font is amtt10 
[mode_setup]
10287: fntnum0 current font is amr10 
[' would be recognized as a preloaded subroutine of plain ]
10354: fnt1 72 current font is manual 
[META]
10363: fntnum0 current font is amr10 
[-]
10365: pop 
level 1:(h=0,v=22061848,w=0,x=0,y=786432,z=1026246,hh=0,vv=1118) 
10366: y0 786432 v:=22061848+786432=22848280, vv:=1158 
10367: push 
level 1:(h=0,v=22848280,w=0,x=0,y=786432,z=1026246,hh=0,vv=1158) 
10368: fnt1 72 current font is manual 
[FONT]
10381: fntnum0 current font is amr10 
[, but plain ]
10397: fnt1 72 current font is manual 
[METAFONT ]
10412: fntnum0 current font is amr10 
[doesn't have any built-in meaning for ]
10462: fntnum29 current font is amtt10 
[mode.setup]
10473: fntnum0 current font is amr10 
[.]
10475: pop 
level 1:(h=0,v=22848280,w=0,x=0,y=786432,z=1026246,hh=0,vv=1158) 
10476: y0 786432 v:=22848280+786432=23634712, vv:=1198 
10477: push 
level 1:(h=0,v=23634712,w=0,x=0,y=786432,z=1026246,hh=0,vv=1198) 
[Hence ]
10487: fntnum29 current font is amtt10 
[mode.setup ]
10499: fntnum0 current font is amr10 
[appears as a sort of orphan, and ]
10539: fnt1 72 current font is manual 
[METAFONT ]
10556: fntnum0 current font is amr10 
[realizes that]
10570: pop 
level 1:(h=0,v=23634712,w=0,x=0,y=786432,z=1026246,hh=0,vv=1198) 
10571: y0 786432 v:=23634712+786432=24421144, vv:=1237 
10572: push 
level 1:(h=0,v=24421144,w=0,x=0,y=786432,z=1026246,hh=0,vv=1237) 
[something is amiss.]
10595: pop 
level 1:(h=0,v=24421144,w=0,x=0,y=786432,z=1026246,hh=0,vv=1237) 
10596: down3 808035 v:=24421144+808035=25229179, vv:=1278 
10600: push 
level 1:(h=0,v=25229179,w=0,x=0,y=786432,z=1026246,hh=0,vv=1278) 
[ In this case it's OK to go ahead and type]
10658: push 
level 2:(h=14705297,v=25229179,w=266168,x=18204,y=786432,z=1026246,hh=746,vv=1278) 
[ ]
10660: fntnum12 current font is amsy10 
[h]
10662: fntnum0 current font is amr10 
[return]
10669: fntnum12 current font is amsy10 
[i]
10671: pop 
level 2:(h=14705297,v=25229179,w=266168,x=18204,y=786432,z=1026246,hh=746,vv=1278) 
[ ]
10676: fntnum0 current font is amr10 
[, because we really]
10703: pop 
level 1:(h=0,v=25229179,w=0,x=0,y=786432,z=1026246,hh=0,vv=1278) 
10704: y0 786432 v:=25229179+786432=26015611, vv:=1318 
10705: push 
level 1:(h=0,v=26015611,w=0,x=0,y=786432,z=1026246,hh=0,vv=1318) 
[don't need to do the operations of]
10746: push 
level 2:(h=9933595,v=26015611,w=240433,x=18204,y=786432,z=1026246,hh=504,vv=1318) 
[ ]
10748: fntnum36 current font is amti10 
[mode]
10757: push 
level 3:(h=11647856,v=26015611,w=240433,x=18204,y=786432,z=1026246,hh=590,vv=1318) 
10762: putrule height 26214, width 200978 (2x11 pixels) 
10771: pop 
level 3:(h=11647856,v=26015611,w=240433,x=18204,y=786432,z=1026246,hh=590,vv=1318) 
[ setup]
10781: pop 
level 2:(h=9933595,v=26015611,w=240433,x=18204,y=786432,z=1026246,hh=504,vv=1318) 
[ ]
10786: fntnum0 current font is amr10 
[when no special mode has been]
10819: pop 
level 1:(h=0,v=26015611,w=0,x=0,y=786432,z=1026246,hh=0,vv=1318) 
10820: y0 786432 v:=26015611+786432=26802043, vv:=1358 
10821: push 
level 1:(h=0,v=26802043,w=0,x=0,y=786432,z=1026246,hh=0,vv=1358) 
[selected. ]
10835: fnt1 72 current font is manual 
[METAFONT ]
10855: fntnum0 current font is amr10 
[will continue by forgetting the isolated expression, and it]
10926: pop 
level 1:(h=0,v=26802043,w=0,x=0,y=786432,z=1026246,hh=0,vv=1358) 
10927: y0 786432 v:=26802043+786432=27588475, vv:=1398 
10928: push 
level 1:(h=0,v=27588475,w=0,x=0,y=786432,z=1026246,hh=0,vv=1398) 
[will ignore the rest of line 1 because everything after a `]
10997: fntnum29 current font is amtt10 
[%]
10999: fntnum0 current font is amr10 
[' sign is always ignored.]
11027: pop 
level 1:(h=0,v=27588475,w=0,x=0,y=786432,z=1026246,hh=0,vv=1398) 
11028: y0 786432 v:=27588475+786432=28374907, vv:=1438 
11029: push 
level 1:(h=0,v=28374907,w=0,x=0,y=786432,z=1026246,hh=0,vv=1438) 
[(This is another thing that will be explained in Chapter xx; it's a handy way]
[ to]
11126: pop 
level 1:(h=0,v=28374907,w=0,x=0,y=786432,z=1026246,hh=0,vv=1438) 
11127: y0 786432 v:=28374907+786432=29161339, vv:=1478 
11128: push 
level 1:(h=0,v=29161339,w=0,x=0,y=786432,z=1026246,hh=0,vv=1478) 
[put comments into your ]
11160: fnt1 72 current font is manual 
[METAFONT ]
11177: fntnum0 current font is amr10 
[programs.) The changes that were made to]
11223: pop 
level 1:(h=0,v=29161339,w=0,x=0,y=786432,z=1026246,hh=0,vv=1478) 
11224: y0 786432 v:=29161339+786432=29947771, vv:=1518 
11225: push 
level 1:(h=0,v=29947771,w=0,x=0,y=786432,z=1026246,hh=0,vv=1518) 
[line 1 of ]
11239: fntnum29 current font is amtt10 
[badio.mf ]
11249: fntnum0 current font is amr10 
[therefore turn out to be relatively harmless; but ]
11309: fnt1 72 current font is manual 
[METAFONT]
11325: pop 
level 1:(h=0,v=29947771,w=0,x=0,y=786432,z=1026246,hh=0,vv=1518) 
11326: y0 786432 v:=29947771+786432=30734203, vv:=1557 
11327: push 
level 1:(h=0,v=30734203,w=0,x=0,y=786432,z=1026246,hh=0,vv=1557) 
11328: fntnum0 current font is amr10 
[almost immediately encounters the mutilated semicolon in line 2:]
11400: pop 
level 1:(h=0,v=30734203,w=0,x=0,y=786432,z=1026246,hh=0,vv=1557) 
11401: down3 4983648 v:=30734203+4983648=35717851, vv:=1810 
11405: push 
level 1:(h=0,v=35717851,w=0,x=0,y=786432,z=1026246,hh=0,vv=1810) 
11406: push 
level 2:(h=0,v=35717851,w=0,x=0,y=786432,z=1026246,hh=0,vv=1810) 
11407: down3 -3932160 v:=35717851-3932160=31785691, vv:=1611 
11411: push 
level 3:(h=0,v=31785691,w=0,x=0,y=786432,z=1026246,hh=0,vv=1611) 
[ ]
11416: fntnum29 current font is amtt10 
[! Extra tokens will be flushed.]
11451: pop 
level 3:(h=0,v=31785691,w=0,x=0,y=786432,z=1026246,hh=0,vv=1611) 
11452: y0 786432 v:=31785691+786432=32572123, vv:=1651 
11453: push 
level 3:(h=0,v=32572123,w=0,x=0,y=786432,z=1026246,hh=0,vv=1651) 
[ <to be read again>]
11479: pop 
level 3:(h=0,v=32572123,w=0,x=0,y=786432,z=1026246,hh=0,vv=1651) 
11480: y0 786432 v:=32572123+786432=33358555, vv:=1690 
11481: push 
level 3:(h=0,v=33358555,w=0,x=0,y=786432,z=1026246,hh=0,vv=1690) 
[ :]
11488: pop 
level 3:(h=0,v=33358555,w=0,x=0,y=786432,z=1026246,hh=0,vv=1690) 
11489: y0 786432 v:=33358555+786432=34144987, vv:=1730 
11490: push 
level 3:(h=0,v=34144987,w=0,x=0,y=786432,z=1026246,hh=0,vv=1730) 
[ l.2 em#:=10pt#:]
11513: pop 
level 3:(h=0,v=34144987,w=0,x=0,y=786432,z=1026246,hh=0,vv=1730) 
11514: y0 786432 v:=34144987+786432=34931419, vv:=1770 
11515: push 
level 3:(h=0,v=34931419,w=0,x=0,y=786432,z=1026246,hh=0,vv=1770) 
[ cap#:=7pt#;]
11531: pop 
level 3:(h=0,v=34931419,w=0,x=0,y=786432,z=1026246,hh=0,vv=1770) 
11532: y0 786432 v:=34931419+786432=35717851, vv:=1810 
11533: push 
level 3:(h=0,v=35717851,w=0,x=0,y=786432,z=1026246,hh=0,vv=1810) 
[ ?]
11539: pop 
level 3:(h=0,v=35717851,w=0,x=0,y=786432,z=1026246,hh=0,vv=1810) 
11540: pop 
level 2:(h=0,v=35717851,w=0,x=0,y=786432,z=1026246,hh=0,vv=1810) 
11541: pop 
level 1:(h=0,v=35717851,w=0,x=0,y=786432,z=1026246,hh=0,vv=1810) 
11542: down3 1244456 v:=35717851+1244456=36962307, vv:=1873 
11546: push 
level 1:(h=0,v=36962307,w=0,x=0,y=786432,z=1026246,hh=0,vv=1873) 
11547: fntnum0 current font is amr10 
[What does this mean? Type `]
11588: fntnum29 current font is amtt10 
[H]
11590: fntnum0 current font is amr10 
[' to ]
11599: setchar12 h:=10031443+364088=10395531, hh:=526 
[nd out. ]
11611: fnt1 72 current font is manual 
[METAFONT ]
11628: fntnum0 current font is amr10 
[has no idea what to do]
11651: pop 
level 1:(h=0,v=36962307,w=0,x=0,y=786432,z=1026246,hh=0,vv=1873) 
11652: pop 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
11653: eop 
 
11654: beginning of page 814 
11699: down3 2359296 v:=0+2359296=2359296, vv:=120 
11703: push 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
11704: down3 -1703936 v:=2359296-1703936=655360, vv:=33 
11708: push 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
11709: push 
level 2:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
[ ]
11714: fntnum23 current font is ambx10 
[814]
11718: pop 
level 2:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
11719: fntnum36 current font is amti10 
[Experimental Pages for The T]
11755: push 
level 2:(h=8708990,v=655360,w=234473,x=-33497,y=0,z=0,hh=442,vv=33) 
11760: down3 141084 v:=655360+141084=796444, vv:=40 
[E]
11765: pop 
level 2:(h=8708990,v=655360,w=234473,x=-33497,y=0,z=0,hh=442,vv=33) 
[ Xbook]
11777: pop 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
11778: pop 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
11779: down4 34603008 v:=2359296+34603008=36962304, vv:=1873 
11784: push 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
11785: down4 -34603008 v:=36962304-34603008=2359296, vv:=120 
11790: push 
level 1:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
11791: push 
level 2:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
11792: down3 3276800 v:=2359296+3276800=5636096, vv:=286 
11796: push 
level 3:(h=0,v=5636096,w=0,x=0,y=0,z=0,hh=0,vv=286) 
11797: down3 -2621440 v:=5636096-2621440=3014656, vv:=153 
11801: push 
level 4:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
[ ]
11807: fntnum3 current font is amr7 
11808: setchar13 h:=24379392+320398=24699790, hh:=1251 
[ushing]
11815: pop 
level 4:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
11816: y3 524288 v:=3014656+524288=3538944, vv:=179 
11820: push 
level 4:(h=0,v=3538944,w=0,x=0,y=524288,z=0,hh=0,vv=179) 
[ ...]
11829: pop 
level 4:(h=0,v=3538944,w=0,x=0,y=524288,z=0,hh=0,vv=179) 
11830: y0 524288 v:=3538944+524288=4063232, vv:=206 
11831: push 
level 4:(h=0,v=4063232,w=0,x=0,y=524288,z=0,hh=0,vv=206) 
[ EXPR]
11841: pop 
level 4:(h=0,v=4063232,w=0,x=0,y=524288,z=0,hh=0,vv=206) 
11842: y0 524288 v:=4063232+524288=4587520, vv:=232 
11843: push 
level 4:(h=0,v=4587520,w=0,x=0,y=524288,z=0,hh=0,vv=232) 
[ SUFFIX]
11855: pop 
level 4:(h=0,v=4587520,w=0,x=0,y=524288,z=0,hh=0,vv=232) 
11856: y0 524288 v:=4587520+524288=5111808, vv:=259 
11857: push 
level 4:(h=0,v=5111808,w=0,x=0,y=524288,z=0,hh=0,vv=259) 
[ rotation]
11871: pop 
level 4:(h=0,v=5111808,w=0,x=0,y=524288,z=0,hh=0,vv=259) 
11872: y0 524288 v:=5111808+524288=5636096, vv:=286 
11873: push 
level 4:(h=0,v=5636096,w=0,x=0,y=524288,z=0,hh=0,vv=286) 
[ transformations]
11894: pop 
level 4:(h=0,v=5636096,w=0,x=0,y=524288,z=0,hh=0,vv=286) 
11895: pop 
level 3:(h=0,v=5636096,w=0,x=0,y=0,z=0,hh=0,vv=286) 
11896: pop 
level 2:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
11897: pop 
level 1:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
11898: down3 655360 v:=2359296+655360=3014656, vv:=153 
11902: push 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
11903: fntnum0 current font is amr10 
[with a `]
11915: fntnum29 current font is amtt10 
[:]
11917: fntnum0 current font is amr10 
[' at this place in the ]
11944: setchar12 h:=8613515+364088=8977603, hh:=454 
[le, so it plans to recover by \]
11987: setchar13 h:=17247387+364088=17611475, hh:=892 
[ushing" or getting]
12006: pop 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
12007: y3 786432 v:=3014656+786432=3801088, vv:=193 
12011: push 
level 1:(h=0,v=3801088,w=0,x=0,y=786432,z=0,hh=0,vv=193) 
[rid of everything it sees, until coming to a semicolon. It would be a bad ide]
[a to]
12110: pop 
level 1:(h=0,v=3801088,w=0,x=0,y=786432,z=0,hh=0,vv=193) 
12111: y0 786432 v:=3801088+786432=4587520, vv:=232 
12112: push 
level 1:(h=0,v=4587520,w=0,x=0,y=786432,z=0,hh=0,vv=232) 
[type]
12123: push 
level 2:(h=1256104,v=4587520,w=-18205,x=0,y=786432,z=0,hh=64,vv=232) 
[ ]
12128: fntnum12 current font is amsy10 
[h]
12130: fntnum0 current font is amr10 
[return]
12137: fntnum12 current font is amsy10 
[i]
12139: pop 
level 2:(h=1256104,v=4587520,w=-18205,x=0,y=786432,z=0,hh=64,vv=232) 
[ ]
12144: fntnum0 current font is amr10 
[now, since you'd lose the important assignment `]
12206: fntnum29 current font is amtt10 
[cap#:=7pt#]
12217: fntnum0 current font is amr10 
[', and]
12227: pop 
level 1:(h=0,v=4587520,w=0,x=0,y=786432,z=0,hh=0,vv=232) 
12228: y0 786432 v:=4587520+786432=5373952, vv:=272 
12229: push 
level 1:(h=0,v=5373952,w=0,x=0,y=786432,z=0,hh=0,vv=272) 
[that would lead to worse errors.]
12269: pop 
level 1:(h=0,v=5373952,w=0,x=0,y=786432,z=0,hh=0,vv=272) 
12270: down3 815195 v:=5373952+815195=6189147, vv:=314 
12274: push 
level 1:(h=0,v=6189147,w=0,x=0,y=786432,z=0,hh=0,vv=314) 
[ You might type `]
12309: fntnum29 current font is amtt10 
[X]
12311: fntnum0 current font is amr10 
[' or `]
12321: fntnum29 current font is amtt10 
[E]
12323: fntnum0 current font is amr10 
[' at this point, to exit from ]
12363: fnt1 72 current font is manual 
[METAFONT ]
12380: fntnum0 current font is amr10 
[and]
12384: pop 
level 1:(h=0,v=6189147,w=0,x=0,y=786432,z=0,hh=0,vv=314) 
12385: y0 786432 v:=6189147+786432=6975579, vv:=353 
12386: push 
level 1:(h=0,v=6975579,w=0,x=0,y=786432,z=0,hh=0,vv=353) 
12387: setchar12 h:=0+364088=364088, hh:=18 
[x the errors in lines 1 and 2 before trying again. But it's usually best to k]
[eep]
12481: pop 
level 1:(h=0,v=6975579,w=0,x=0,y=786432,z=0,hh=0,vv=353) 
12482: y0 786432 v:=6975579+786432=7762011, vv:=393 
12483: push 
level 1:(h=0,v=7762011,w=0,x=0,y=786432,z=0,hh=0,vv=393) 
[going, trying to detect and correct as many mistakes as possible in each run,]
12575: pop 
level 1:(h=0,v=7762011,w=0,x=0,y=786432,z=0,hh=0,vv=393) 
12576: y0 786432 v:=7762011+786432=8548443, vv:=433 
12577: push 
level 1:(h=0,v=8548443,w=0,x=0,y=786432,z=0,hh=0,vv=433) 
[since that increases your productivity while decreasing your computer bills. ]
[An]
12671: pop 
level 1:(h=0,v=8548443,w=0,x=0,y=786432,z=0,hh=0,vv=433) 
12672: y0 786432 v:=8548443+786432=9334875, vv:=473 
12673: push 
level 1:(h=0,v=9334875,w=0,x=0,y=786432,z=0,hh=0,vv=473) 
[experienced ]
12692: fnt1 72 current font is manual 
[METAFONT ]
12709: fntnum0 current font is amr10 
[user will quit after an error only if the error is un]
12763: setchar12 h:=20749428+364088=21113516, hh:=1069 
[xable,]
12770: pop 
level 1:(h=0,v=9334875,w=0,x=0,y=786432,z=0,hh=0,vv=473) 
12771: y0 786432 v:=9334875+786432=10121307, vv:=513 
12772: push 
level 1:(h=0,v=10121307,w=0,x=0,y=786432,z=0,hh=0,vv=513) 
[or if there's almost no chance that additional errors are present.]
12846: pop 
level 1:(h=0,v=10121307,w=0,x=0,y=786432,z=0,hh=0,vv=513) 
12847: z3 815195 v:=10121307+815195=10936502, vv:=554 
12851: push 
level 1:(h=0,v=10936502,w=0,x=0,y=786432,z=815195,hh=0,vv=554) 
[ The solution in this case is to proceed in two steps: First type `]
12942: fntnum29 current font is amtt10 
[1]
12944: fntnum0 current font is amr10 
[', which]
12959: pop 
level 1:(h=0,v=10936502,w=0,x=0,y=786432,z=815195,hh=0,vv=554) 
12960: y0 786432 v:=10936502+786432=11722934, vv:=594 
12961: push 
level 1:(h=0,v=11722934,w=0,x=0,y=786432,z=815195,hh=0,vv=594) 
[tells ]
12971: fnt1 72 current font is manual 
[METAFONT ]
12988: fntnum0 current font is amr10 
[to delete the next token (the unwanted `]
13035: fntnum29 current font is amtt10 
[:]
13037: fntnum0 current font is amr10 
['); then type `]
13060: fntnum29 current font is amtt10 
[I;]
13063: fntnum0 current font is amr10 
[',]
13066: pop 
level 1:(h=0,v=11722934,w=0,x=0,y=786432,z=815195,hh=0,vv=594) 
13067: y0 786432 v:=11722934+786432=12509366, vv:=634 
13068: push 
level 1:(h=0,v=12509366,w=0,x=0,y=786432,z=815195,hh=0,vv=634) 
[which inserts a semicolon. This semicolon rescues the rest of line 2, so all ]
[will]
13162: pop 
level 1:(h=0,v=12509366,w=0,x=0,y=786432,z=815195,hh=0,vv=634) 
13163: y0 786432 v:=12509366+786432=13295798, vv:=674 
13164: push 
level 1:(h=0,v=13295798,w=0,x=0,y=786432,z=815195,hh=0,vv=674) 
[go well until ]
13186: fnt1 72 current font is manual 
[METAFONT ]
13203: fntnum0 current font is amr10 
[reaches another garbled line.]
13234: pop 
level 1:(h=0,v=13295798,w=0,x=0,y=786432,z=815195,hh=0,vv=674) 
13235: z0 815195 v:=13295798+815195=14110993, vv:=715 
13236: push 
level 1:(h=0,v=14110993,w=0,x=0,y=786432,z=815195,hh=0,vv=715) 
[ The next error message is more elaborate, because it is detected while]
13324: pop 
level 1:(h=0,v=14110993,w=0,x=0,y=786432,z=815195,hh=0,vv=715) 
13325: y0 786432 v:=14110993+786432=14897425, vv:=755 
13326: push 
level 1:(h=0,v=14897425,w=0,x=0,y=786432,z=815195,hh=0,vv=755) 
13327: fnt1 72 current font is manual 
[METAFONT ]
13347: fntnum0 current font is amr10 
[is trying to carry out a]
13372: push 
level 2:(h=10145712,v=14897425,w=211313,x=0,y=786432,z=815195,hh=515,vv=755) 
[ ]
13374: fntnum36 current font is amti10 
[penpos]
13386: pop 
level 2:(h=10145712,v=14897425,w=211313,x=0,y=786432,z=815195,hh=515,vv=755) 
[ ]
13391: fntnum0 current font is amr10 
[command;]
13400: push 
level 2:(h=15480528,v=14897425,w=211313,x=0,y=786432,z=815195,hh=785,vv=755) 
[ ]
13405: fntnum36 current font is amti10 
[penpos]
13417: pop 
level 2:(h=15480528,v=14897425,w=211313,x=0,y=786432,z=815195,hh=785,vv=755) 
[ ]
13422: fntnum0 current font is amr10 
[is not a primitive]
13444: pop 
level 1:(h=0,v=14897425,w=0,x=0,y=786432,z=815195,hh=0,vv=755) 
13445: y0 786432 v:=14897425+786432=15683857, vv:=795 
13446: push 
level 1:(h=0,v=15683857,w=0,x=0,y=786432,z=815195,hh=0,vv=795) 
[operation (it is de]
13472: setchar12 h:=5151824+364088=5515912, hh:=279 
[ned in plain ]
13486: fnt1 72 current font is manual 
[METAFONT]
13502: fntnum0 current font is amr10 
[), hence a lot more context is given:]
13544: pop 
level 1:(h=0,v=15683857,w=0,x=0,y=786432,z=815195,hh=0,vv=795) 
13545: down3 7400834 v:=15683857+7400834=23084691, vv:=1170 
13549: push 
level 1:(h=0,v=23084691,w=0,x=0,y=786432,z=815195,hh=0,vv=1170) 
13550: push 
level 2:(h=0,v=23084691,w=0,x=0,y=786432,z=815195,hh=0,vv=1170) 
13551: down3 -6291456 v:=23084691-6291456=16793235, vv:=851 
13555: push 
level 3:(h=0,v=16793235,w=0,x=0,y=786432,z=815195,hh=0,vv=851) 
[ ]
13560: fntnum29 current font is amtt10 
[>> l0]
13569: pop 
level 3:(h=0,v=16793235,w=0,x=0,y=786432,z=815195,hh=0,vv=851) 
13570: y0 786432 v:=16793235+786432=17579667, vv:=891 
13571: push 
level 3:(h=0,v=17579667,w=0,x=0,y=786432,z=815195,hh=0,vv=891) 
[ ! Improper transformation argument.]
13614: pop 
level 3:(h=0,v=17579667,w=0,x=0,y=786432,z=815195,hh=0,vv=891) 
13615: y0 786432 v:=17579667+786432=18366099, vv:=931 
13616: push 
level 3:(h=0,v=18366099,w=0,x=0,y=786432,z=815195,hh=0,vv=931) 
[ <to be read again>]
13642: pop 
level 3:(h=0,v=18366099,w=0,x=0,y=786432,z=815195,hh=0,vv=931) 
13643: y0 786432 v:=18366099+786432=19152531, vv:=971 
13644: push 
level 3:(h=0,v=19152531,w=0,x=0,y=786432,z=815195,hh=0,vv=971) 
[ ;]
13651: pop 
level 3:(h=0,v=19152531,w=0,x=0,y=786432,z=815195,hh=0,vv=971) 
13652: y0 786432 v:=19152531+786432=19938963, vv:=1010 
13653: push 
level 3:(h=0,v=19938963,w=0,x=0,y=786432,z=815195,hh=0,vv=1010) 
[ penpos->...(EXPR3),0)rotated(EXPR4);]
13694: pop 
level 3:(h=0,v=19938963,w=0,x=0,y=786432,z=815195,hh=0,vv=1010) 
13695: y0 786432 v:=19938963+786432=20725395, vv:=1050 
13696: push 
level 3:(h=0,v=20725395,w=0,x=0,y=786432,z=815195,hh=0,vv=1050) 
[ z(SUFFIX2)=0.5[z(SUFF...]
13726: pop 
level 3:(h=0,v=20725395,w=0,x=0,y=786432,z=815195,hh=0,vv=1050) 
13727: y0 786432 v:=20725395+786432=21511827, vv:=1090 
13728: push 
level 3:(h=0,v=21511827,w=0,x=0,y=786432,z=815195,hh=0,vv=1090) 
[ l.10 penpos1(thick,l0)]
13758: pop 
level 3:(h=0,v=21511827,w=0,x=0,y=786432,z=815195,hh=0,vv=1090) 
13759: y0 786432 v:=21511827+786432=22298259, vv:=1130 
13760: push 
level 3:(h=0,v=22298259,w=0,x=0,y=786432,z=815195,hh=0,vv=1130) 
[ ; penpos2(.1[thin,thick],90-10);]
13801: pop 
level 3:(h=0,v=22298259,w=0,x=0,y=786432,z=815195,hh=0,vv=1130) 
13802: y0 786432 v:=22298259+786432=23084691, vv:=1170 
13803: push 
level 3:(h=0,v=23084691,w=0,x=0,y=786432,z=815195,hh=0,vv=1170) 
[ ?]
13809: pop 
level 3:(h=0,v=23084691,w=0,x=0,y=786432,z=815195,hh=0,vv=1170) 
13810: pop 
level 2:(h=0,v=23084691,w=0,x=0,y=786432,z=815195,hh=0,vv=1170) 
13811: pop 
level 1:(h=0,v=23084691,w=0,x=0,y=786432,z=815195,hh=0,vv=1170) 
13812: down3 1265937 v:=23084691+1265937=24350628, vv:=1234 
13816: push 
level 1:(h=0,v=24350628,w=0,x=0,y=786432,z=815195,hh=0,vv=1234) 
13817: fntnum0 current font is amr10 
[At ]
13827: setchar12 h:=900507+364088=1264595, hh:=64 
[rst, such error messages will appear to be complete nonsense to you, because]
13919: pop 
level 1:(h=0,v=24350628,w=0,x=0,y=786432,z=815195,hh=0,vv=1234) 
13920: y0 786432 v:=24350628+786432=25137060, vv:=1274 
13921: push 
level 1:(h=0,v=25137060,w=0,x=0,y=786432,z=815195,hh=0,vv=1274) 
[much of what you see is low-level ]
13968: fnt1 72 current font is manual 
[METAFONT ]
13985: fntnum0 current font is amr10 
[code that you never wrote. But you]
14029: pop 
level 1:(h=0,v=25137060,w=0,x=0,y=786432,z=815195,hh=0,vv=1274) 
14030: y0 786432 v:=25137060+786432=25923492, vv:=1314 
14031: push 
level 1:(h=0,v=25923492,w=0,x=0,y=786432,z=815195,hh=0,vv=1314) 
[can overcome this hangup by getting a feeling for the way ]
14100: fnt1 72 current font is manual 
[METAFONT ]
14117: fntnum0 current font is amr10 
[operates.]
14130: pop 
level 1:(h=0,v=25923492,w=0,x=0,y=786432,z=815195,hh=0,vv=1314) 
14131: z0 815195 v:=25923492+815195=26738687, vv:=1355 
14132: push 
level 1:(h=0,v=26738687,w=0,x=0,y=786432,z=815195,hh=0,vv=1355) 
[ The bottom line shows how much progress ]
14189: fnt1 72 current font is manual 
[METAFONT ]
14206: fntnum0 current font is amr10 
[has made so far]
14222: pop 
level 1:(h=0,v=26738687,w=0,x=0,y=786432,z=815195,hh=0,vv=1355) 
14223: y0 786432 v:=26738687+786432=27525119, vv:=1395 
14224: push 
level 1:(h=0,v=27525119,w=0,x=0,y=786432,z=815195,hh=0,vv=1395) 
[in the ]
14235: fntnum29 current font is amtt10 
[badio ]
14242: fntnum0 current font is amr10 
14243: setchar12 h:=3913432+364088=4277520, hh:=216 
[le: It has read `]
14264: fntnum29 current font is amtt10 
[penpos1(thick,l0)]
14282: fntnum0 current font is amr10 
[' but not yet the semicolon,]
14314: pop 
level 1:(h=0,v=27525119,w=0,x=0,y=786432,z=815195,hh=0,vv=1395) 
14315: y0 786432 v:=27525119+786432=28311551, vv:=1435 
14316: push 
level 1:(h=0,v=28311551,w=0,x=0,y=786432,z=815195,hh=0,vv=1435) 
[on line 10. The]
14338: push 
level 2:(h=4562744,v=28311551,w=249908,x=0,y=786432,z=815195,hh=231,vv=1435) 
[ ]
14340: fntnum36 current font is amti10 
[penpos]
14352: pop 
level 2:(h=4562744,v=28311551,w=249908,x=0,y=786432,z=815195,hh=231,vv=1435) 
[ ]
14357: fntnum0 current font is amr10 
[routine expands into a long list of tokens; indeed, this]
14424: pop 
level 1:(h=0,v=28311551,w=0,x=0,y=786432,z=815195,hh=0,vv=1435) 
14425: y0 786432 v:=28311551+786432=29097983, vv:=1474 
14426: push 
level 1:(h=0,v=29097983,w=0,x=0,y=786432,z=815195,hh=0,vv=1474) 
[list is so long that it can't all be shown on two lines, and the appearances ]
[of]
14523: pop 
level 1:(h=0,v=29097983,w=0,x=0,y=786432,z=815195,hh=0,vv=1474) 
14524: y0 786432 v:=29097983+786432=29884415, vv:=1514 
14525: push 
level 1:(h=0,v=29884415,w=0,x=0,y=786432,z=815195,hh=0,vv=1514) 
[`]
14527: fntnum29 current font is amtt10 
[...]
14531: fntnum0 current font is amr10 
[' indicate that the de]
14560: setchar12 h:=7327570+364088=7691658, hh:=389 
[nition of]
14570: push 
level 2:(h=10100918,v=29884415,w=206526,x=287295,y=786432,z=815195,hh=512,vv=1514) 
[ ]
14572: fntnum36 current font is amti10 
[penpos]
14584: pop 
level 2:(h=10100918,v=29884415,w=206526,x=287295,y=786432,z=815195,hh=512,vv=1514) 
[ ]
14589: fntnum0 current font is amr10 
[has been truncated here. Parameter]
14630: pop 
level 1:(h=0,v=29884415,w=0,x=0,y=786432,z=815195,hh=0,vv=1514) 
14631: y0 786432 v:=29884415+786432=30670847, vv:=1554 
14632: push 
level 1:(h=0,v=30670847,w=0,x=0,y=786432,z=815195,hh=0,vv=1554) 
[values are often inserted into the expansion of a high-level routine; in this]
[ case,]
14730: pop 
level 1:(h=0,v=30670847,w=0,x=0,y=786432,z=815195,hh=0,vv=1554) 
14731: y0 786432 v:=30670847+786432=31457279, vv:=1594 
14732: push 
level 1:(h=0,v=31457279,w=0,x=0,y=786432,z=815195,hh=0,vv=1594) 
[for example, `]
14753: fntnum29 current font is amtt10 
[(EXPR3)]
14761: fntnum0 current font is amr10 
[' and `]
14769: fntnum29 current font is amtt10 
[(EXPR4)]
14777: fntnum0 current font is amr10 
[' correspond to the respective parameters]
14826: pop 
level 1:(h=0,v=31457279,w=0,x=0,y=786432,z=815195,hh=0,vv=1594) 
14827: y0 786432 v:=31457279+786432=32243711, vv:=1634 
14828: push 
level 1:(h=0,v=32243711,w=0,x=0,y=786432,z=815195,hh=0,vv=1634) 
[`]
14830: fntnum29 current font is amtt10 
[thick]
14836: fntnum0 current font is amr10 
[' and `]
14847: fntnum29 current font is amtt10 
[l0]
14850: fntnum0 current font is amr10 
[', and `]
14862: fntnum29 current font is amtt10 
[(SUFFIX2)]
14872: fntnum0 current font is amr10 
[' corresponds to `]
14894: fntnum29 current font is amtt10 
[1]
14896: fntnum0 current font is amr10 
['. ]
14903: fnt1 72 current font is manual 
[METAFONT ]
14920: fntnum0 current font is amr10 
[detected an]
14932: pop 
level 1:(h=0,v=32243711,w=0,x=0,y=786432,z=815195,hh=0,vv=1634) 
14933: y0 786432 v:=32243711+786432=33030143, vv:=1674 
14934: push 
level 1:(h=0,v=33030143,w=0,x=0,y=786432,z=815195,hh=0,vv=1674) 
[error just after encountering the phrase `]
14983: fntnum29 current font is amtt10 
[rotated(EXPR4)]
14998: fntnum0 current font is amr10 
['; the value of ]
15022: fntnum29 current font is amtt10 
[(EXPR4)]
15030: pop 
level 1:(h=0,v=33030143,w=0,x=0,y=786432,z=815195,hh=0,vv=1674) 
15031: y0 786432 v:=33030143+786432=33816575, vv:=1714 
15032: push 
level 1:(h=0,v=33816575,w=0,x=0,y=786432,z=815195,hh=0,vv=1714) 
15033: fntnum0 current font is amr10 
[was an unde]
15051: setchar12 h:=3657640+364088=4021728, hh:=202 
[ned quantity (namely `]
15076: fntnum29 current font is amtt10 
[l0]
15079: fntnum0 current font is amr10 
[', which ]
15093: fnt1 72 current font is manual 
[METAFONT ]
15110: fntnum0 current font is amr10 
[treats as the sub-]
15129: pop 
level 1:(h=0,v=33816575,w=0,x=0,y=786432,z=815195,hh=0,vv=1714) 
15130: y0 786432 v:=33816575+786432=34603007, vv:=1753 
15131: push 
level 1:(h=0,v=34603007,w=0,x=0,y=786432,z=815195,hh=0,vv=1753) 
[scripted variable `]
15158: fntdef1 6: ammi10---loaded at size 655360 DVI units 
15180: fntnum6 current font is ammi10 
[l]
15182: push 
level 2:(h=5444297,v=34603007,w=279191,x=0,y=786432,z=815195,hh=276,vv=1753) 
15183: down3 98303 v:=34603007+98303=34701310, vv:=1758 
15187: fntnum3 current font is amr7 
[0]
15189: pop 
level 2:(h=5444297,v=34603007,w=279191,x=0,y=786432,z=815195,hh=276,vv=1753) 
[ ]
15194: fntnum0 current font is amr10 
[' ), and rotation is permitted only when a known numeric]
15264: pop 
level 1:(h=0,v=34603007,w=0,x=0,y=786432,z=815195,hh=0,vv=1753) 
15265: y0 786432 v:=34603007+786432=35389439, vv:=1793 
15266: push 
level 1:(h=0,v=35389439,w=0,x=0,y=786432,z=815195,hh=0,vv=1793) 
[value has been supplied. Rotations are particular instances of what ]
15348: fnt1 72 current font is manual 
[METAFONT]
15364: pop 
level 1:(h=0,v=35389439,w=0,x=0,y=786432,z=815195,hh=0,vv=1793) 
15365: y0 786432 v:=35389439+786432=36175871, vv:=1833 
15366: push 
level 1:(h=0,v=36175871,w=0,x=0,y=786432,z=815195,hh=0,vv=1833) 
15367: fntnum0 current font is amr10 
[calls ]
15377: fntnum33 current font is amsl10 
[transformations]
15396: fntnum0 current font is amr10 
[; hence ]
15408: fnt1 72 current font is manual 
[METAFONT ]
15425: fntnum0 current font is amr10 
[describes this particular error by saying]
15474: pop 
level 1:(h=0,v=36175871,w=0,x=0,y=786432,z=815195,hh=0,vv=1833) 
15475: y0 786432 v:=36175871+786432=36962303, vv:=1873 
15476: push 
level 1:(h=0,v=36962303,w=0,x=0,y=786432,z=815195,hh=0,vv=1873) 
[that an \improper transformation argument" was present.]
15543: pop 
level 1:(h=0,v=36962303,w=0,x=0,y=786432,z=815195,hh=0,vv=1873) 
15544: pop 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
15545: eop 
 
15546: beginning of page 815 
15591: down3 2359296 v:=0+2359296=2359296, vv:=120 
15595: push 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
15596: down3 -1703936 v:=2359296-1703936=655360, vv:=33 
15600: push 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
[ ]
15606: fntnum36 current font is amti10 
[Experimental Pages for The T]
15642: push 
level 2:(h=20796027,v=655360,w=234473,x=-33497,y=0,z=0,hh=1054,vv=33) 
15647: down3 141084 v:=655360+141084=796444, vv:=40 
[E]
15652: pop 
level 2:(h=20796027,v=655360,w=234473,x=-33497,y=0,z=0,hh=1054,vv=33) 
[ Xbook]
15664: push 
level 2:(h=22735986,v=655360,w=234473,x=-33497,y=0,z=0,hh=1151,vv=33) 
[ ]
15669: fntnum23 current font is ambx10 
[815]
15673: pop 
level 2:(h=22735986,v=655360,w=234473,x=-33497,y=0,z=0,hh=1151,vv=33) 
15674: pop 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
15675: pop 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
15676: down4 34603008 v:=2359296+34603008=36962304, vv:=1873 
15681: push 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
15682: down4 -33947648 v:=36962304-33947648=3014656, vv:=153 
15687: push 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
[ ]
15692: fntnum0 current font is amr10 
[When you get a multiline error message like this, the best clues about]
15778: pop 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
15779: y3 786432 v:=3014656+786432=3801088, vv:=193 
15783: push 
level 1:(h=0,v=3801088,w=0,x=0,y=786432,z=0,hh=0,vv=193) 
[the source of the trouble are usually on the bottom line (since that is what]
15866: pop 
level 1:(h=0,v=3801088,w=0,x=0,y=786432,z=0,hh=0,vv=193) 
15867: y0 786432 v:=3801088+786432=4587520, vv:=232 
15868: push 
level 1:(h=0,v=4587520,w=0,x=0,y=786432,z=0,hh=0,vv=232) 
[you typed) and on the top line (since that is what triggered the error messag]
[e).]
15959: pop 
level 1:(h=0,v=4587520,w=0,x=0,y=786432,z=0,hh=0,vv=232) 
15960: y0 786432 v:=4587520+786432=5373952, vv:=272 
15961: push 
level 1:(h=0,v=5373952,w=0,x=0,y=786432,z=0,hh=0,vv=272) 
[Somewhere in there you can usually spot the problem.]
16023: pop 
level 1:(h=0,v=5373952,w=0,x=0,y=786432,z=0,hh=0,vv=272) 
16024: z3 808035 v:=5373952+808035=6181987, vv:=313 
16028: push 
level 1:(h=0,v=6181987,w=0,x=0,y=786432,z=808035,hh=0,vv=313) 
[ If you type `]
16056: fntnum29 current font is amtt10 
[H]
16058: fntnum0 current font is amr10 
[' now, you'll ]
16081: setchar12 h:=10134667+364088=10498755, hh:=532 
[nd that ]
16090: fnt1 72 current font is manual 
[METAFONT ]
16107: fntnum0 current font is amr10 
[has simply decided to]
16129: pop 
level 1:(h=0,v=6181987,w=0,x=0,y=786432,z=808035,hh=0,vv=313) 
16130: y0 786432 v:=6181987+786432=6968419, vv:=353 
16131: push 
level 1:(h=0,v=6968419,w=0,x=0,y=786432,z=808035,hh=0,vv=353) 
[continue without doing the requested rotation. Thus if you respond by typing]
16227: pop 
level 1:(h=0,v=6968419,w=0,x=0,y=786432,z=808035,hh=0,vv=353) 
16228: y0 786432 v:=6968419+786432=7754851, vv:=393 
16229: push 
level 1:(h=0,v=7754851,w=0,x=0,y=786432,z=808035,hh=0,vv=393) 
16230: push 
level 2:(h=0,v=7754851,w=0,x=0,y=786432,z=808035,hh=0,vv=393) 
16231: fntnum12 current font is amsy10 
[h]
16233: fntnum0 current font is amr10 
[return]
16240: fntnum12 current font is amsy10 
[i]
16242: pop 
level 2:(h=0,v=7754851,w=0,x=0,y=786432,z=808035,hh=0,vv=393) 
[ ]
16247: fntnum0 current font is amr10 
[, ]
16253: fnt1 72 current font is manual 
[METAFONT ]
16273: fntnum0 current font is amr10 
[will go on as if the program had said `]
16313: fntnum29 current font is amtt10 
[penpos1(thick,0)]
16330: fntnum0 current font is amr10 
['.]
16333: pop 
level 1:(h=0,v=7754851,w=0,x=0,y=786432,z=808035,hh=0,vv=393) 
16334: y0 786432 v:=7754851+786432=8541283, vv:=433 
16335: push 
level 1:(h=0,v=8541283,w=0,x=0,y=786432,z=808035,hh=0,vv=433) 
[Comparatively little harm has been done; but there's actually a way to correc]
[t]
16428: pop 
level 1:(h=0,v=8541283,w=0,x=0,y=786432,z=808035,hh=0,vv=433) 
16429: y0 786432 v:=8541283+786432=9327715, vv:=473 
16430: push 
level 1:(h=0,v=9327715,w=0,x=0,y=786432,z=808035,hh=0,vv=473) 
[the error before proceeding: Type]
16478: pop 
level 1:(h=0,v=9327715,w=0,x=0,y=786432,z=808035,hh=0,vv=473) 
16479: y3 1244456 v:=9327715+1244456=10572171, vv:=536 
16483: push 
level 1:(h=0,v=10572171,w=0,x=0,y=1244456,z=808035,hh=0,vv=536) 
16484: push 
level 2:(h=0,v=10572171,w=0,x=0,y=1244456,z=808035,hh=0,vv=536) 
16485: push 
level 3:(h=0,v=10572171,w=0,x=0,y=1244456,z=808035,hh=0,vv=536) 
[ ]
16490: fntnum29 current font is amtt10 
[I rotated 10]
16506: pop 
level 3:(h=0,v=10572171,w=0,x=0,y=1244456,z=808035,hh=0,vv=536) 
16507: pop 
level 2:(h=0,v=10572171,w=0,x=0,y=1244456,z=808035,hh=0,vv=536) 
16508: pop 
level 1:(h=0,v=10572171,w=0,x=0,y=1244456,z=808035,hh=0,vv=536) 
16509: y0 1244456 v:=10572171+1244456=11816627, vv:=599 
16510: push 
level 1:(h=0,v=11816627,w=0,x=0,y=1244456,z=808035,hh=0,vv=599) 
16511: fntnum0 current font is amr10 
[and ]
16519: fnt1 72 current font is manual 
[METAFONT ]
16536: fntnum0 current font is amr10 
[will rotate by 10 degrees as if ]
16572: fntnum29 current font is amtt10 
[l0 ]
16576: fntnum0 current font is amr10 
[had been ]
16589: fntnum29 current font is amtt10 
[10]
16592: fntnum0 current font is amr10 
[.]
16594: pop 
level 1:(h=0,v=11816627,w=0,x=0,y=1244456,z=808035,hh=0,vv=599) 
16595: z0 808035 v:=11816627+808035=12624662, vv:=640 
16596: push 
level 1:(h=0,v=12624662,w=0,x=0,y=1244456,z=808035,hh=0,vv=640) 
[ What happens next in Experiment 5? ]
16649: fnt1 72 current font is manual 
[METAFONT ]
16666: fntnum0 current font is amr10 
[will hiccup on the]
16685: pop 
level 1:(h=0,v=12624662,w=0,x=0,y=1244456,z=808035,hh=0,vv=640) 
16686: y3 786432 v:=12624662+786432=13411094, vv:=680 
16690: push 
level 1:(h=0,v=13411094,w=0,x=0,y=786432,z=808035,hh=0,vv=680) 
[remaining bug that we planted in the ]
16735: setchar12 h:=11369925+364088=11734013, hh:=594 
[le. This time, however, the error will]
16786: pop 
level 1:(h=0,v=13411094,w=0,x=0,y=786432,z=808035,hh=0,vv=680) 
16787: y0 786432 v:=13411094+786432=14197526, vv:=719 
16788: push 
level 1:(h=0,v=14197526,w=0,x=0,y=786432,z=808035,hh=0,vv=719) 
[not be discovered until much later, because there's nothing wrong with line 1]
[1]
16889: pop 
level 1:(h=0,v=14197526,w=0,x=0,y=786432,z=808035,hh=0,vv=719) 
16890: y0 786432 v:=14197526+786432=14983958, vv:=759 
16891: push 
level 1:(h=0,v=14983958,w=0,x=0,y=786432,z=808035,hh=0,vv=759) 
[as it stands. (The variable ]
16930: fntnum29 current font is amtt10 
[thinn ]
16937: fntnum0 current font is amr10 
[is not de]
16947: setchar12 h:=12800839+364088=13164927, hh:=666 
[ned, but unde]
16964: setchar12 h:=17239332+364088=17603420, hh:=890 
[ned quantities are]
16986: pop 
level 1:(h=0,v=14983958,w=0,x=0,y=786432,z=808035,hh=0,vv=759) 
16987: y0 786432 v:=14983958+786432=15770390, vv:=799 
16988: push 
level 1:(h=0,v=15770390,w=0,x=0,y=786432,z=808035,hh=0,vv=799) 
[no problem unless you're doing something complicated like rotation. Indeed,]
17074: pop 
level 1:(h=0,v=15770390,w=0,x=0,y=786432,z=808035,hh=0,vv=799) 
17075: y0 786432 v:=15770390+786432=16556822, vv:=839 
17076: push 
level 1:(h=0,v=16556822,w=0,x=0,y=786432,z=808035,hh=0,vv=839) 
17077: fnt1 72 current font is manual 
[METAFONT ]
17097: fntnum0 current font is amr10 
[programs typically consist of equations in which there are lots of]
17168: pop 
level 1:(h=0,v=16556822,w=0,x=0,y=786432,z=808035,hh=0,vv=839) 
17169: y0 786432 v:=16556822+786432=17343254, vv:=879 
17170: push 
level 1:(h=0,v=17343254,w=0,x=0,y=786432,z=808035,hh=0,vv=879) 
[unknowns; variables get more and more de]
17224: setchar12 h:=12225444+364088=12589532, hh:=637 
[ned as time goes on. Hence spelling]
17267: pop 
level 1:(h=0,v=17343254,w=0,x=0,y=786432,z=808035,hh=0,vv=879) 
17268: y0 786432 v:=17343254+786432=18129686, vv:=919 
17269: push 
level 1:(h=0,v=18129686,w=0,x=0,y=786432,z=808035,hh=0,vv=919) 
[errors cannot possibly be detected until the last minute.) Finally comes the]
17360: pop 
level 1:(h=0,v=18129686,w=0,x=0,y=786432,z=808035,hh=0,vv=919) 
17361: y0 786432 v:=18129686+786432=18916118, vv:=959 
17362: push 
level 1:(h=0,v=18916118,w=0,x=0,y=786432,z=808035,hh=0,vv=959) 
[moment of truth, when ]
17394: fntnum29 current font is amtt10 
[badio ]
17401: fntnum0 current font is amr10 
[tries to draw a path through an unknown point;]
17454: pop 
level 1:(h=0,v=18916118,w=0,x=0,y=786432,z=808035,hh=0,vv=959) 
17455: y0 786432 v:=18916118+786432=19702550, vv:=998 
17456: push 
level 1:(h=0,v=19702550,w=0,x=0,y=786432,z=808035,hh=0,vv=998) 
[and you will get an error message that's even scarier than the previous one:]
17540: pop 
level 1:(h=0,v=19702550,w=0,x=0,y=786432,z=808035,hh=0,vv=998) 
17541: down4 10488672 v:=19702550+10488672=30191222, vv:=1530 
17546: push 
level 1:(h=0,v=30191222,w=0,x=0,y=786432,z=808035,hh=0,vv=1530) 
17547: push 
level 2:(h=0,v=30191222,w=0,x=0,y=786432,z=808035,hh=0,vv=1530) 
17548: down4 -9437184 v:=30191222-9437184=20754038, vv:=1052 
17553: push 
level 3:(h=0,v=20754038,w=0,x=0,y=786432,z=808035,hh=0,vv=1052) 
[ ]
17558: fntnum29 current font is amtt10 
[>> 0.08682thinn+144]
17581: pop 
level 3:(h=0,v=20754038,w=0,x=0,y=786432,z=808035,hh=0,vv=1052) 
17582: y0 786432 v:=20754038+786432=21540470, vv:=1092 
17583: push 
level 3:(h=0,v=21540470,w=0,x=0,y=786432,z=808035,hh=0,vv=1092) 
[ ! Undefined x coordinate has been replaced by 0.]
17639: pop 
level 3:(h=0,v=21540470,w=0,x=0,y=786432,z=808035,hh=0,vv=1092) 
17640: y0 786432 v:=21540470+786432=22326902, vv:=1131 
17641: push 
level 3:(h=0,v=22326902,w=0,x=0,y=786432,z=808035,hh=0,vv=1131) 
[ <to be read again>]
17667: pop 
level 3:(h=0,v=22326902,w=0,x=0,y=786432,z=808035,hh=0,vv=1131) 
17668: y0 786432 v:=22326902+786432=23113334, vv:=1171 
17669: push 
level 3:(h=0,v=23113334,w=0,x=0,y=786432,z=808035,hh=0,vv=1171) 
[ {]
17676: pop 
level 3:(h=0,v=23113334,w=0,x=0,y=786432,z=808035,hh=0,vv=1171) 
17677: y0 786432 v:=23113334+786432=23899766, vv:=1211 
17678: push 
level 3:(h=0,v=23899766,w=0,x=0,y=786432,z=808035,hh=0,vv=1211) 
[ <for(4)> ...e:if.known.dz(SUFFIX0):{]
17722: pop 
level 3:(h=0,v=23899766,w=0,x=0,y=786432,z=808035,hh=0,vv=1211) 
17723: y0 786432 v:=23899766+786432=24686198, vv:=1251 
17724: push 
level 3:(h=0,v=24686198,w=0,x=0,y=786432,z=808035,hh=0,vv=1251) 
[ dz(SUFFIX0)}fi.fi.fi ...]
17757: pop 
level 3:(h=0,v=24686198,w=0,x=0,y=786432,z=808035,hh=0,vv=1251) 
17758: y0 786432 v:=24686198+786432=25472630, vv:=1291 
17759: push 
level 3:(h=0,v=25472630,w=0,x=0,y=786432,z=808035,hh=0,vv=1291) 
[ <for(l)> ...dz$:{dz$}fi.fi.fi.endfor]
17803: pop 
level 3:(h=0,v=25472630,w=0,x=0,y=786432,z=808035,hh=0,vv=1291) 
17804: y0 786432 v:=25472630+786432=26259062, vv:=1331 
17805: push 
level 3:(h=0,v=26259062,w=0,x=0,y=786432,z=808035,hh=0,vv=1331) 
[ ; ENDFOR]
17822: pop 
level 3:(h=0,v=26259062,w=0,x=0,y=786432,z=808035,hh=0,vv=1331) 
17823: y0 786432 v:=26259062+786432=27045494, vv:=1370 
17824: push 
level 3:(h=0,v=27045494,w=0,x=0,y=786432,z=808035,hh=0,vv=1370) 
[ penstroke->...fi.fi.fi.endfor;endfor]
17865: pop 
level 3:(h=0,v=27045494,w=0,x=0,y=786432,z=808035,hh=0,vv=1370) 
17866: y0 786432 v:=27045494+786432=27831926, vv:=1410 
17867: push 
level 3:(h=0,v=27831926,w=0,x=0,y=786432,z=808035,hh=0,vv=1410) 
[ .endgroup;if.cycle.pa...]
17897: pop 
level 3:(h=0,v=27831926,w=0,x=0,y=786432,z=808035,hh=0,vv=1410) 
17898: y0 786432 v:=27831926+786432=28618358, vv:=1450 
17899: push 
level 3:(h=0,v=28618358,w=0,x=0,y=786432,z=808035,hh=0,vv=1450) 
[ l.15 penstroke(1,2,3,4,cycle)]
17936: pop 
level 3:(h=0,v=28618358,w=0,x=0,y=786432,z=808035,hh=0,vv=1450) 
17937: y0 786432 v:=28618358+786432=29404790, vv:=1490 
17938: push 
level 3:(h=0,v=29404790,w=0,x=0,y=786432,z=808035,hh=0,vv=1490) 
[ ;]
17945: pop 
level 3:(h=0,v=29404790,w=0,x=0,y=786432,z=808035,hh=0,vv=1490) 
17946: y0 786432 v:=29404790+786432=30191222, vv:=1530 
17947: push 
level 3:(h=0,v=30191222,w=0,x=0,y=786432,z=808035,hh=0,vv=1530) 
[ ?]
17953: pop 
level 3:(h=0,v=30191222,w=0,x=0,y=786432,z=808035,hh=0,vv=1530) 
17954: pop 
level 2:(h=0,v=30191222,w=0,x=0,y=786432,z=808035,hh=0,vv=1530) 
17955: pop 
level 1:(h=0,v=30191222,w=0,x=0,y=786432,z=808035,hh=0,vv=1530) 
17956: down3 1244456 v:=30191222+1244456=31435678, vv:=1593 
17960: push 
level 1:(h=0,v=31435678,w=0,x=0,y=786432,z=808035,hh=0,vv=1593) 
17961: fntnum0 current font is amr10 
[The expansion of]
17981: push 
level 2:(h=4976752,v=31435678,w=247412,x=0,y=786432,z=808035,hh=252,vv=1593) 
[ ]
17983: fntnum36 current font is amti10 
[penstroke]
17998: pop 
level 2:(h=4976752,v=31435678,w=247412,x=0,y=786432,z=808035,hh=252,vv=1593) 
[ ]
18003: fntnum0 current font is amr10 
[involves two]
18026: push 
level 2:(h=11681206,v=31435678,w=-18205,x=247412,y=786432,z=808035,hh=592,vv=1593) 
[ ]
18028: fntnum23 current font is ambx10 
[for]
18032: pop 
level 2:(h=11681206,v=31435678,w=-18205,x=247412,y=786432,z=808035,hh=592,vv=1593) 
[ ]
18037: fntnum0 current font is amr10 
[loops, and the error was detected]
18078: pop 
level 1:(h=0,v=31435678,w=0,x=0,y=786432,z=808035,hh=0,vv=1593) 
18079: y0 786432 v:=31435678+786432=32222110, vv:=1633 
18080: push 
level 1:(h=0,v=32222110,w=0,x=0,y=786432,z=808035,hh=0,vv=1633) 
[in the midst of these. The expression `]
18126: fntnum29 current font is amtt10 
[0.08682thinn+144]
18143: fntnum0 current font is amr10 
[' just above the er-]
18174: pop 
level 1:(h=0,v=32222110,w=0,x=0,y=786432,z=808035,hh=0,vv=1633) 
18175: y0 786432 v:=32222110+786432=33008542, vv:=1673 
18176: push 
level 1:(h=0,v=33008542,w=0,x=0,y=786432,z=808035,hh=0,vv=1673) 
[ror message implies that the culprit in this case was a misspelled `]
18254: fntnum29 current font is amtt10 
[thin]
18259: fntnum0 current font is amr10 
['. If]
18268: pop 
level 1:(h=0,v=33008542,w=0,x=0,y=786432,z=808035,hh=0,vv=1673) 
18269: y0 786432 v:=33008542+786432=33794974, vv:=1712 
18270: push 
level 1:(h=0,v=33794974,w=0,x=0,y=786432,z=808035,hh=0,vv=1712) 
[that hadn't been enough information, you could have gleaned another clue from]
18362: pop 
level 1:(h=0,v=33794974,w=0,x=0,y=786432,z=808035,hh=0,vv=1712) 
18363: y0 786432 v:=33794974+786432=34581406, vv:=1752 
18364: push 
level 1:(h=0,v=34581406,w=0,x=0,y=786432,z=808035,hh=0,vv=1752) 
[`]
18366: fntnum29 current font is amtt10 
[<for(4)>]
18375: fntnum0 current font is amr10 
[', which puts ]
18399: fntnum6 current font is ammi10 
[z]
18401: push 
level 2:(h=7139568,v=34581406,w=212260,x=-18205,y=786432,z=808035,hh=361,vv=1752) 
18402: down3 98303 v:=34581406+98303=34679709, vv:=1757 
18406: fntnum3 current font is amr7 
[4]
18408: pop 
level 2:(h=7139568,v=34581406,w=212260,x=-18205,y=786432,z=808035,hh=361,vv=1752) 
[ ]
18413: fntnum0 current font is amr10 
[under suspicion because it says that the current loop]
18475: pop 
level 1:(h=0,v=34581406,w=0,x=0,y=786432,z=808035,hh=0,vv=1752) 
18476: y0 786432 v:=34581406+786432=35367838, vv:=1792 
18477: push 
level 1:(h=0,v=35367838,w=0,x=0,y=786432,z=808035,hh=0,vv=1792) 
[value is 4.]
18496: pop 
level 1:(h=0,v=35367838,w=0,x=0,y=786432,z=808035,hh=0,vv=1792) 
18497: z0 808035 v:=35367838+808035=36175873, vv:=1833 
18498: push 
level 1:(h=0,v=36175873,w=0,x=0,y=786432,z=808035,hh=0,vv=1833) 
[ In any event the mistake on line 11 has propagated too far to be ]
18581: setchar12 h:=20749427+364088=21113515, hh:=1069 
[xable,]
18588: pop 
level 1:(h=0,v=36175873,w=0,x=0,y=786432,z=808035,hh=0,vv=1833) 
18589: y0 786432 v:=36175873+786432=36962305, vv:=1873 
18590: push 
level 1:(h=0,v=36962305,w=0,x=0,y=786432,z=808035,hh=0,vv=1873) 
[so you're justi]
18612: setchar12 h:=4127760+364088=4491848, hh:=226 
[ed in typing `]
18628: fntnum29 current font is amtt10 
[X]
18630: fntnum0 current font is amr10 
[' or `]
18640: fntnum29 current font is amtt10 
[E]
18642: fntnum0 current font is amr10 
[' at this point. But type `]
18683: fntnum29 current font is amtt10 
[S]
18685: fntnum0 current font is amr10 
[' instead, just]
18707: pop 
level 1:(h=0,v=36962305,w=0,x=0,y=786432,z=808035,hh=0,vv=1873) 
18708: pop 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
18709: eop 
 
18710: beginning of page 816 
18755: down3 2359296 v:=0+2359296=2359296, vv:=120 
18759: push 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
18760: down3 -1703936 v:=2359296-1703936=655360, vv:=33 
18764: push 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
18765: push 
level 2:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
[ ]
18770: fntnum23 current font is ambx10 
[816]
18774: pop 
level 2:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
18775: fntnum36 current font is amti10 
[Experimental Pages for The T]
18811: push 
level 2:(h=8708990,v=655360,w=234473,x=-33497,y=0,z=0,hh=442,vv=33) 
18816: down3 141084 v:=655360+141084=796444, vv:=40 
[E]
18821: pop 
level 2:(h=8708990,v=655360,w=234473,x=-33497,y=0,z=0,hh=442,vv=33) 
[ Xbook]
18833: pop 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
18834: pop 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
18835: down4 34603008 v:=2359296+34603008=36962304, vv:=1873 
18840: push 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
18841: down4 -34603008 v:=36962304-34603008=2359296, vv:=120 
18846: push 
level 1:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
18847: push 
level 2:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
18848: down3 655360 v:=2359296+655360=3014656, vv:=153 
18852: push 
level 3:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
18853: push 
level 4:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
[ ]
18859: fntnum3 current font is amr7 
[editing]
18867: pop 
level 4:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
18868: pop 
level 3:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
18869: pop 
level 2:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
18870: pop 
level 1:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
18871: down3 655360 v:=2359296+655360=3014656, vv:=153 
18875: push 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
18876: fntnum0 current font is amr10 
[for fun: This tells ]
18903: fnt1 72 current font is manual 
[METAFONT ]
18920: fntnum0 current font is amr10 
[to plunge ahead, correcting all remaining errors]
18972: pop 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
18973: y3 786432 v:=3014656+786432=3801088, vv:=193 
18977: push 
level 1:(h=0,v=3801088,w=0,x=0,y=786432,z=0,hh=0,vv=193) 
[as best it can. (There will be a few more problems, since several variables s]
[till]
19079: pop 
level 1:(h=0,v=3801088,w=0,x=0,y=786432,z=0,hh=0,vv=193) 
19080: y0 786432 v:=3801088+786432=4587520, vv:=232 
19081: push 
level 1:(h=0,v=4587520,w=0,x=0,y=786432,z=0,hh=0,vv=232) 
[depend on `]
19099: fntnum29 current font is amtt10 
[thinn]
19105: fntnum0 current font is amr10 
['.) ]
19113: fnt1 72 current font is manual 
[METAFONT ]
19130: fntnum0 current font is amr10 
[will draw a very strange letter O before it gets]
19189: pop 
level 1:(h=0,v=4587520,w=0,x=0,y=786432,z=0,hh=0,vv=232) 
19190: y0 786432 v:=4587520+786432=5373952, vv:=272 
19191: push 
level 1:(h=0,v=5373952,w=0,x=0,y=786432,z=0,hh=0,vv=272) 
[to the end of the ]
19213: setchar12 h:=5042624+364088=5406712, hh:=274 
[le! Then you should type `]
19250: fntnum29 current font is amtt10 
[end]
19254: fntnum0 current font is amr10 
[' to terminate the run.]
19278: pop 
level 1:(h=0,v=5373952,w=0,x=0,y=786432,z=0,hh=0,vv=272) 
19279: y0 786432 v:=5373952+786432=6160384, vv:=312 
19280: push 
level 1:(h=0,v=6160384,w=0,x=0,y=786432,z=0,hh=0,vv=312) 
[ If you try to edit ]
19310: fntnum29 current font is amtt10 
[bad.io ]
19318: fntnum0 current font is amr10 
[again, you'll notice that line 2 still contains]
19371: pop 
level 1:(h=0,v=6160384,w=0,x=0,y=786432,z=0,hh=0,vv=312) 
19372: y0 786432 v:=6160384+786432=6946816, vv:=352 
19373: push 
level 1:(h=0,v=6946816,w=0,x=0,y=786432,z=0,hh=0,vv=352) 
[a colon instead of a semicolon; the fact that you told ]
19438: fnt1 72 current font is manual 
[METAFONT ]
19455: fntnum0 current font is amr10 
[to delete the]
19469: pop 
level 1:(h=0,v=6946816,w=0,x=0,y=786432,z=0,hh=0,vv=352) 
19470: y0 786432 v:=6946816+786432=7733248, vv:=392 
19471: push 
level 1:(h=0,v=7733248,w=0,x=0,y=786432,z=0,hh=0,vv=392) 
[colon and to insert additional material doesn't mean that your ]
19544: setchar12 h:=18265356+364088=18629444, hh:=944 
[le has changed]
19560: pop 
level 1:(h=0,v=7733248,w=0,x=0,y=786432,z=0,hh=0,vv=392) 
19561: y0 786432 v:=7733248+786432=8519680, vv:=432 
19562: push 
level 1:(h=0,v=8519680,w=0,x=0,y=786432,z=0,hh=0,vv=432) 
[in any way. However, the transcript ]
19620: setchar12 h:=10351257+364088=10715345, hh:=543 
[le ]
19624: fntnum29 current font is amtt10 
[badio.log ]
19635: fntnum0 current font is amr10 
[has a record of all the errors,]
19667: pop 
level 1:(h=0,v=8519680,w=0,x=0,y=786432,z=0,hh=0,vv=432) 
19668: y0 786432 v:=8519680+786432=9306112, vv:=472 
19669: push 
level 1:(h=0,v=9306112,w=0,x=0,y=786432,z=0,hh=0,vv=472) 
[so it's a handy reference when you want to correct mistakes. (Why not look at]
19763: pop 
level 1:(h=0,v=9306112,w=0,x=0,y=786432,z=0,hh=0,vv=472) 
19764: y0 786432 v:=9306112+786432=10092544, vv:=511 
19765: push 
level 1:(h=0,v=10092544,w=0,x=0,y=786432,z=0,hh=0,vv=511) 
19766: fntnum29 current font is amtt10 
[badio.log ]
19780: fntnum0 current font is amr10 
[now, and ]
19793: fntnum29 current font is amtt10 
[io.log ]
19801: fntnum0 current font is amr10 
[too, in order to get familiar with log ]
19844: setchar12 h:=19099615+364088=19463703, hh:=986 
[les?)]
19850: pop 
level 1:(h=0,v=10092544,w=0,x=0,y=786432,z=0,hh=0,vv=511) 
19851: down3 1114112 v:=10092544+1114112=11206656, vv:=568 
19855: push 
level 1:(h=0,v=11206656,w=0,x=0,y=786432,z=0,hh=0,vv=568) 
19856: push 
level 2:(h=0,v=11206656,w=0,x=0,y=786432,z=0,hh=0,vv=568) 
19857: fntdef1 49: manfnt---loaded at size 655360 DVI units 
19879: fntnum49 current font is manfnt 
19880: setchar127 h:=0+910222=910222, hh:=46 
19881: pop 
level 2:(h=0,v=11206656,w=0,x=0,y=786432,z=0,hh=0,vv=568) 
19882: push 
level 2:(h=0,v=11206656,w=0,x=0,y=786432,z=0,hh=0,vv=568) 
[ ]
19887: fnt1 72 current font is manual 
[x]
19890: pop 
level 2:(h=0,v=11206656,w=0,x=0,y=786432,z=0,hh=0,vv=568) 
[ ]
19895: fntdef1 25: ambx8---loaded at size 524288 DVI units 
19916: fntnum25 current font is ambx8 
[EXERCISE ]
19932: fntdef1 24: ambx9---loaded at size 589824 DVI units 
19953: fntnum24 current font is ambx9 
[X.1]
19957: pop 
level 1:(h=0,v=11206656,w=0,x=0,y=786432,z=0,hh=0,vv=568) 
19958: y3 720896 v:=11206656+720896=11927552, vv:=604 
19962: push 
level 1:(h=0,v=11927552,w=0,x=0,y=720896,z=0,hh=0,vv=604) 
[ ]
19967: fntdef1 1: amr9---loaded at size 589824 DVI units 
19987: fntnum1 current font is amr9 
[Suppose you were doing Experiment 3 with ]
20043: fntdef1 30: amtt9---loaded at size 589824 DVI units 
20064: fntnum30 current font is amtt9 
[badio ]
20071: fntnum1 current font is amr9 
[instead of ]
20083: fntnum30 current font is amtt9 
[io]
20086: fntnum1 current font is amr9 
[, so you began]
20108: pop 
level 1:(h=0,v=11927552,w=0,x=0,y=720896,z=0,hh=0,vv=604) 
20109: y0 720896 v:=11927552+720896=12648448, vv:=641 
20110: push 
level 1:(h=0,v=12648448,w=0,x=0,y=720896,z=0,hh=0,vv=641) 
[by saying `]
20129: fntnum30 current font is amtt9 
[\mode=smoke]
20141: fntnum1 current font is amr9 
[; ]
20147: fntnum30 current font is amtt9 
[input badio]
20162: fntnum1 current font is amr9 
['. Then you would want to recover from the error]
20220: pop 
level 1:(h=0,v=12648448,w=0,x=0,y=720896,z=0,hh=0,vv=641) 
20221: y0 720896 v:=12648448+720896=13369344, vv:=677 
20222: push 
level 1:(h=0,v=13369344,w=0,x=0,y=720896,z=0,hh=0,vv=677) 
[on line 1 by inserting a correct]
20261: push 
level 2:(h=8016447,v=13369344,w=177636,x=-16839,y=720896,z=0,hh=407,vv=677) 
[ ]
20263: fntdef1 37: amti9---loaded at size 589824 DVI units 
20284: fntnum37 current font is amti9 
[mode]
20292: push 
level 3:(h=9531014,v=13369344,w=177636,x=-16839,y=720896,z=0,hh=482,vv=677) 
20297: putrule height 26214, width 181973 (2x10 pixels) 
20306: pop 
level 3:(h=9531014,v=13369344,w=177636,x=-16839,y=720896,z=0,hh=482,vv=677) 
[ setup]
20316: pop 
level 2:(h=8016447,v=13369344,w=177636,x=-16839,y=720896,z=0,hh=407,vv=677) 
[ ]
20321: fntnum1 current font is amr9 
[command, instead of by simply]
20355: push 
level 2:(h=19524131,v=13369344,w=177636,x=-16839,y=720896,z=0,hh=990,vv=677) 
[ ]
20357: fntdef1 13: amsy9---loaded at size 589824 DVI units 
20378: fntnum13 current font is amsy9 
[h]
20380: fntnum1 current font is amr9 
[return]
20387: fntnum13 current font is amsy9 
[i]
20389: pop 
level 2:(h=19524131,v=13369344,w=177636,x=-16839,y=720896,z=0,hh=990,vv=677) 
[ ]
20394: fntnum1 current font is amr9 
[ing,]
20399: pop 
level 1:(h=0,v=13369344,w=0,x=0,y=720896,z=0,hh=0,vv=677) 
20400: y0 720896 v:=13369344+720896=14090240, vv:=714 
20401: push 
level 1:(h=0,v=14090240,w=0,x=0,y=720896,z=0,hh=0,vv=714) 
[because]
20412: push 
level 2:(h=2040897,v=14090240,w=0,x=16839,y=720896,z=0,hh=104,vv=714) 
[ ]
20417: fntnum37 current font is amti9 
[mode]
20425: push 
level 3:(h=3616074,v=14090240,w=0,x=16839,y=720896,z=0,hh=182,vv=714) 
20430: putrule height 26214, width 181973 (2x10 pixels) 
20439: pop 
level 3:(h=3616074,v=14090240,w=0,x=16839,y=720896,z=0,hh=182,vv=714) 
[ setup]
20449: pop 
level 2:(h=2040897,v=14090240,w=0,x=16839,y=720896,z=0,hh=104,vv=714) 
[ ]
20454: fntnum1 current font is amr9 
[is what really establishes]
20484: push 
level 2:(h=12180347,v=14090240,w=238246,x=16839,y=720896,z=0,hh=618,vv=714) 
[ ]
20486: fntnum37 current font is amti9 
[smoke]
20492: pop 
level 2:(h=12180347,v=14090240,w=238246,x=16839,y=720896,z=0,hh=618,vv=714) 
[ ]
20497: fntnum1 current font is amr9 
[mode. Unfortunately if you try]
20535: pop 
level 1:(h=0,v=14090240,w=0,x=0,y=720896,z=0,hh=0,vv=714) 
20536: y0 720896 v:=14090240+720896=14811136, vv:=751 
20537: push 
level 1:(h=0,v=14811136,w=0,x=0,y=720896,z=0,hh=0,vv=751) 
[typing `]
20552: fntnum30 current font is amtt9 
[I mode_setup]
20565: fntnum1 current font is amr9 
[' in response to the \isolated expression" error, it doesn't work.]
20642: pop 
level 1:(h=0,v=14811136,w=0,x=0,y=720896,z=0,hh=0,vv=751) 
20643: y0 720896 v:=14811136+720896=15532032, vv:=787 
20644: push 
level 1:(h=0,v=15532032,w=0,x=0,y=720896,z=0,hh=0,vv=787) 
[What should you type instead?]
20684: pop 
level 1:(h=0,v=15532032,w=0,x=0,y=720896,z=0,hh=0,vv=787) 
20685: down3 1179648 v:=15532032+1179648=16711680, vv:=847 
20689: push 
level 1:(h=0,v=16711680,w=0,x=0,y=720896,z=0,hh=0,vv=847) 
[ ]
20694: fntnum0 current font is amr10 
[By doing the ]
20711: setchar12 h:=6365185+364088=6729273, hh:=341 
[ve experiments in this chapter you have learned at ]
20774: setchar12 h:=21670112+364088=22034200, hh:=1116 
[rst]
20778: pop 
level 1:(h=0,v=16711680,w=0,x=0,y=720896,z=0,hh=0,vv=847) 
20779: y3 786432 v:=16711680+786432=17498112, vv:=887 
20783: push 
level 1:(h=0,v=17498112,w=0,x=0,y=786432,z=0,hh=0,vv=887) 
[hand (1) how to produce proofsheets of various kinds, including \smoke proofs]
[";]
20884: pop 
level 1:(h=0,v=17498112,w=0,x=0,y=786432,z=0,hh=0,vv=887) 
20885: y0 786432 v:=17498112+786432=18284544, vv:=927 
20886: push 
level 1:(h=0,v=18284544,w=0,x=0,y=786432,z=0,hh=0,vv=927) 
[(2) how to make a new font and test it; (3) how to keep calm when ]
20966: fnt1 72 current font is manual 
[METAFONT]
20982: pop 
level 1:(h=0,v=18284544,w=0,x=0,y=786432,z=0,hh=0,vv=927) 
20983: y0 786432 v:=18284544+786432=19070976, vv:=966 
20984: push 
level 1:(h=0,v=19070976,w=0,x=0,y=786432,z=0,hh=0,vv=966) 
20985: fntnum0 current font is amr10 
[issues stern warnings. Congratulations! You're on the threshold of being able]
[ to]
21085: pop 
level 1:(h=0,v=19070976,w=0,x=0,y=786432,z=0,hh=0,vv=966) 
21086: y0 786432 v:=19070976+786432=19857408, vv:=1006 
21087: push 
level 1:(h=0,v=19857408,w=0,x=0,y=786432,z=0,hh=0,vv=1006) 
[do lots more. As you read the following chapters, the best strategy will be f]
[or]
21185: pop 
level 1:(h=0,v=19857408,w=0,x=0,y=786432,z=0,hh=0,vv=1006) 
21186: y0 786432 v:=19857408+786432=20643840, vv:=1046 
21187: push 
level 1:(h=0,v=20643840,w=0,x=0,y=786432,z=0,hh=0,vv=1046) 
[you to continue making trial runs, using experiments of your own design.]
21274: pop 
level 1:(h=0,v=20643840,w=0,x=0,y=786432,z=0,hh=0,vv=1046) 
21275: down3 1179648 v:=20643840+1179648=21823488, vv:=1106 
21279: push 
level 1:(h=0,v=21823488,w=0,x=0,y=786432,z=0,hh=0,vv=1106) 
21280: push 
level 2:(h=0,v=21823488,w=0,x=0,y=786432,z=0,hh=0,vv=1106) 
21285: fnt1 72 current font is manual 
[x]
21288: pop 
level 2:(h=0,v=21823488,w=0,x=0,y=786432,z=0,hh=0,vv=1106) 
21289: fntnum24 current font is ambx9 
[EXERCISE ]
21305: fntnum23 current font is ambx10 
[X.2]
21309: pop 
level 1:(h=0,v=21823488,w=0,x=0,y=786432,z=0,hh=0,vv=1106) 
21310: y0 786432 v:=21823488+786432=22609920, vv:=1146 
21311: push 
level 1:(h=0,v=22609920,w=0,x=0,y=786432,z=0,hh=0,vv=1146) 
21312: fntnum0 current font is amr10 
[However, this has been an extremely long chapter, so you should go outside no]
[w]
21412: pop 
level 1:(h=0,v=22609920,w=0,x=0,y=786432,z=0,hh=0,vv=1146) 
21413: y0 786432 v:=22609920+786432=23396352, vv:=1186 
21414: push 
level 1:(h=0,v=23396352,w=0,x=0,y=786432,z=0,hh=0,vv=1186) 
[and get some ]
21431: fntnum33 current font is amsl10 
[real ]
21440: fntnum0 current font is amr10 
[exercise.]
21450: pop 
level 1:(h=0,v=23396352,w=0,x=0,y=786432,z=0,hh=0,vv=1186) 
21451: pop 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
21452: eop 
 
21453: beginning of page 817 
21498: down3 2359296 v:=0+2359296=2359296, vv:=120 
21502: push 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
21503: down3 -1703936 v:=2359296-1703936=655360, vv:=33 
21507: push 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
[ ]
21513: fntnum36 current font is amti10 
[Experimental Pages for The T]
21549: push 
level 2:(h=20796027,v=655360,w=234473,x=-33497,y=0,z=0,hh=1054,vv=33) 
21554: down3 141084 v:=655360+141084=796444, vv:=40 
[E]
21559: pop 
level 2:(h=20796027,v=655360,w=234473,x=-33497,y=0,z=0,hh=1054,vv=33) 
[ Xbook]
21571: push 
level 2:(h=22735986,v=655360,w=234473,x=-33497,y=0,z=0,hh=1151,vv=33) 
[ ]
21576: fntnum23 current font is ambx10 
[817]
21580: pop 
level 2:(h=22735986,v=655360,w=234473,x=-33497,y=0,z=0,hh=1151,vv=33) 
21581: pop 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
21582: pop 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
21583: down4 34603008 v:=2359296+34603008=36962304, vv:=1873 
21588: push 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
21589: down4 -34603008 v:=36962304-34603008=2359296, vv:=120 
21594: push 
level 1:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
21595: push 
level 2:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
21596: down3 1179648 v:=2359296+1179648=3538944, vv:=179 
21600: push 
level 3:(h=0,v=3538944,w=0,x=0,y=0,z=0,hh=0,vv=179) 
21601: down3 -524288 v:=3538944-524288=3014656, vv:=152 
21605: push 
level 4:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=152) 
[ ]
21611: fntnum3 current font is amr7 
[Aeschylus]
21625: pop 
level 4:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=152) 
21626: down3 524288 v:=3014656+524288=3538944, vv:=179 
21630: push 
level 4:(h=0,v=3538944,w=0,x=0,y=0,z=0,hh=0,vv=179) 
[ RUNNING]
21646: pop 
level 4:(h=0,v=3538944,w=0,x=0,y=0,z=0,hh=0,vv=179) 
21647: pop 
level 3:(h=0,v=3538944,w=0,x=0,y=0,z=0,hh=0,vv=179) 
21648: pop 
level 2:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
21649: pop 
level 1:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
21650: down4 28835840 v:=2359296+28835840=31195136, vv:=1581 
21655: push 
level 1:(h=0,v=31195136,w=0,x=0,y=0,z=0,hh=0,vv=1581) 
[ ]
21661: fntdef1 22: amssqi8---loaded at size 524288 DVI units 
21684: fntnum22 current font is amssqi8 
[Let us learn how Io's frenzy came|]
21725: pop 
level 1:(h=0,v=31195136,w=0,x=0,y=0,z=0,hh=0,vv=1581) 
21726: y3 655360 v:=31195136+655360=31850496, vv:=1614 
21730: push 
level 1:(h=0,v=31850496,w=0,x=0,y=655360,z=0,hh=0,vv=1614) 
[ She telling her disasters manifold.]
21774: pop 
level 1:(h=0,v=31850496,w=0,x=0,y=655360,z=0,hh=0,vv=1614) 
21775: z3 851968 v:=31850496+851968=32702464, vv:=1657 
21779: push 
level 1:(h=0,v=32702464,w=0,x=0,y=655360,z=851968,hh=0,vv=1657) 
[ ]
21785: fntdef1 20: amssq8---loaded at size 524288 DVI units 
21807: fntnum20 current font is amssq8 
[| ]
21813: setchar29 h:=9879564+557056=10436620, hh:=529 
[SCHYLUS, ]
21826: fntnum22 current font is amssqi8 
[Prometheus Bound ]
21847: fntnum20 current font is amssq8 
[(c. 470 B.C.)]
21864: pop 
level 1:(h=0,v=32702464,w=0,x=0,y=655360,z=851968,hh=0,vv=1657) 
21865: down3 1441792 v:=32702464+1441792=34144256, vv:=1730 
21869: push 
level 1:(h=0,v=34144256,w=0,x=0,y=655360,z=851968,hh=0,vv=1730) 
[ ]
21874: fntnum22 current font is amssqi8 
[To the student who wishes to use graphical methods as a tool,]
21947: pop 
level 1:(h=0,v=34144256,w=0,x=0,y=655360,z=851968,hh=0,vv=1730) 
21948: y0 655360 v:=34144256+655360=34799616, vv:=1763 
21949: push 
level 1:(h=0,v=34799616,w=0,x=0,y=655360,z=851968,hh=0,vv=1763) 
[ it can not be emphasized too strongly that practice in the use of that tool]
22037: pop 
level 1:(h=0,v=34799616,w=0,x=0,y=655360,z=851968,hh=0,vv=1763) 
22038: y0 655360 v:=34799616+655360=35454976, vv:=1797 
22039: push 
level 1:(h=0,v=35454976,w=0,x=0,y=655360,z=851968,hh=0,vv=1797) 
[ is as essential as a knowledge of how to use it.]
22100: pop 
level 1:(h=0,v=35454976,w=0,x=0,y=655360,z=851968,hh=0,vv=1797) 
22101: y0 655360 v:=35454976+655360=36110336, vv:=1830 
22102: push 
level 1:(h=0,v=36110336,w=0,x=0,y=655360,z=851968,hh=0,vv=1830) 
[ The oft-repeated pedagogical phrase, \we learn by doing," is applicable here]
[.]
22201: pop 
level 1:(h=0,v=36110336,w=0,x=0,y=655360,z=851968,hh=0,vv=1830) 
22202: z0 851968 v:=36110336+851968=36962304, vv:=1873 
22203: push 
level 1:(h=0,v=36962304,w=0,x=0,y=655360,z=851968,hh=0,vv=1873) 
[ ]
22208: fntnum20 current font is amssq8 
[| THEODORE RUNNING, ]
22235: fntnum22 current font is amssqi8 
[Graphical Mathematics ]
22261: fntnum20 current font is amssq8 
[(1927)]
22268: pop 
level 1:(h=0,v=36962304,w=0,x=0,y=655360,z=851968,hh=0,vv=1873) 
22269: pop 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
22270: eop 
 
22271: beginning of page 818 
22316: down3 2359296 v:=0+2359296=2359296, vv:=120 
22320: push 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
22321: down3 -1703936 v:=2359296-1703936=655360, vv:=33 
22325: push 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
22326: push 
level 2:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
[ ]
22331: fntnum23 current font is ambx10 
[818]
22335: pop 
level 2:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
22336: fntnum36 current font is amti10 
[Experimental Pages for The T]
22372: push 
level 2:(h=8708990,v=655360,w=234473,x=-33497,y=0,z=0,hh=442,vv=33) 
22377: down3 141084 v:=655360+141084=796444, vv:=40 
[E]
22382: pop 
level 2:(h=8708990,v=655360,w=234473,x=-33497,y=0,z=0,hh=442,vv=33) 
[ Xbook]
22394: pop 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
22395: pop 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
22396: down4 34603008 v:=2359296+34603008=36962304, vv:=1873 
22401: push 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
22402: down4 -34603008 v:=36962304-34603008=2359296, vv:=120 
22407: push 
level 1:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
22408: push 
level 2:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
22409: down3 2752512 v:=2359296+2752512=5111808, vv:=259 
22413: push 
level 3:(h=0,v=5111808,w=0,x=0,y=0,z=0,hh=0,vv=259) 
22414: down3 -2097152 v:=5111808-2097152=3014656, vv:=153 
22418: push 
level 4:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
[ ]
22424: fntnum3 current font is amr7 
[scrollmode]
22438: pop 
level 4:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
22439: y3 524288 v:=3014656+524288=3538944, vv:=179 
22443: push 
level 4:(h=0,v=3538944,w=0,x=0,y=524288,z=0,hh=0,vv=179) 
[ nonstopmode]
22463: pop 
level 4:(h=0,v=3538944,w=0,x=0,y=524288,z=0,hh=0,vv=179) 
22464: y0 524288 v:=3538944+524288=4063232, vv:=206 
22465: push 
level 4:(h=0,v=4063232,w=0,x=0,y=524288,z=0,hh=0,vv=206) 
[ batchmode]
22486: pop 
level 4:(h=0,v=4063232,w=0,x=0,y=524288,z=0,hh=0,vv=206) 
22487: y0 524288 v:=4063232+524288=4587520, vv:=232 
22488: push 
level 4:(h=0,v=4587520,w=0,x=0,y=524288,z=0,hh=0,vv=232) 
[ errorstopmode]
22510: pop 
level 4:(h=0,v=4587520,w=0,x=0,y=524288,z=0,hh=0,vv=232) 
22511: y0 524288 v:=4587520+524288=5111808, vv:=259 
22512: push 
level 4:(h=0,v=5111808,w=0,x=0,y=524288,z=0,hh=0,vv=259) 
[ interrupt]
22530: pop 
level 4:(h=0,v=5111808,w=0,x=0,y=524288,z=0,hh=0,vv=259) 
22531: pop 
level 3:(h=0,v=5111808,w=0,x=0,y=0,z=0,hh=0,vv=259) 
22532: pop 
level 2:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
22533: pop 
level 1:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
22534: down3 655360 v:=2359296+655360=3014656, vv:=153 
22538: push 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
[ ]
22543: fntnum0 current font is amr10 
[inserting anything, ]
22573: fnt1 72 current font is manual 
[METAFONT ]
22590: fntnum0 current font is amr10 
[would have gone ahead and read `]
22626: fntnum29 current font is amtt10 
[1in]
22630: fntnum0 current font is amr10 
[',]
22633: pop 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
22634: y3 786432 v:=3014656+786432=3801088, vv:=193 
22638: push 
level 1:(h=0,v=3801088,w=0,x=0,y=786432,z=0,hh=0,vv=193) 
[which it would have regarded as part of a paragraph to be typeset. Alternativ]
[ely,]
22744: pop 
level 1:(h=0,v=3801088,w=0,x=0,y=786432,z=0,hh=0,vv=193) 
22745: y0 786432 v:=3801088+786432=4587520, vv:=232 
22746: push 
level 1:(h=0,v=4587520,w=0,x=0,y=786432,z=0,hh=0,vv=232) 
[you could have typed `]
22781: fntnum29 current font is amtt10 
[3]
22783: fntnum0 current font is amr10 
[' ; that would have deleted `]
22822: fntnum29 current font is amtt10 
[1in]
22826: fntnum0 current font is amr10 
[' from ]
22834: fnt1 72 current font is manual 
[METAFONT]
22850: fntnum0 current font is amr10 
['s input.]
22860: pop 
level 1:(h=0,v=4587520,w=0,x=0,y=786432,z=0,hh=0,vv=232) 
22861: y0 786432 v:=4587520+786432=5373952, vv:=272 
22862: push 
level 1:(h=0,v=5373952,w=0,x=0,y=786432,z=0,hh=0,vv=272) 
[Or you could have typed `]
22900: fntnum29 current font is amtt10 
[X]
22902: fntnum0 current font is amr10 
[' or `]
22912: fntnum29 current font is amtt10 
[E]
22914: fntnum0 current font is amr10 
[' in order to correct the spelling error in your]
22969: pop 
level 1:(h=0,v=5373952,w=0,x=0,y=786432,z=0,hh=0,vv=272) 
22970: y0 786432 v:=5373952+786432=6160384, vv:=312 
22971: push 
level 1:(h=0,v=6160384,w=0,x=0,y=786432,z=0,hh=0,vv=312) 
22972: setchar12 h:=0+364088=364088, hh:=18 
[le. But it's usually best to try to detect as many errors as you can, each ti]
[me]
23069: pop 
level 1:(h=0,v=6160384,w=0,x=0,y=786432,z=0,hh=0,vv=312) 
23070: y0 786432 v:=6160384+786432=6946816, vv:=352 
23071: push 
level 1:(h=0,v=6946816,w=0,x=0,y=786432,z=0,hh=0,vv=352) 
[you run ]
23086: fnt1 72 current font is manual 
[METAFONT]
23102: fntnum0 current font is amr10 
[, since that increases your productivity while decreasing your]
23171: pop 
level 1:(h=0,v=6946816,w=0,x=0,y=786432,z=0,hh=0,vv=352) 
23172: y0 786432 v:=6946816+786432=7733248, vv:=392 
23173: push 
level 1:(h=0,v=7733248,w=0,x=0,y=786432,z=0,hh=0,vv=392) 
[computer bills. Chapter 27 explains more about the art of steering ]
23250: fnt1 72 current font is manual 
[METAFONT]
23266: pop 
level 1:(h=0,v=7733248,w=0,x=0,y=786432,z=0,hh=0,vv=392) 
23267: y0 786432 v:=7733248+786432=8519680, vv:=432 
23268: push 
level 1:(h=0,v=8519680,w=0,x=0,y=786432,z=0,hh=0,vv=432) 
23269: fntnum0 current font is amr10 
[through troubled text.]
23295: pop 
level 1:(h=0,v=8519680,w=0,x=0,y=786432,z=0,hh=0,vv=432) 
23296: y3 1114112 v:=8519680+1114112=9633792, vv:=488 
23300: push 
level 1:(h=0,v=9633792,w=0,x=0,y=1114112,z=0,hh=0,vv=488) 
23301: push 
level 2:(h=0,v=9633792,w=0,x=0,y=1114112,z=0,hh=0,vv=488) 
23302: fntnum49 current font is manfnt 
23303: setchar127 h:=0+910222=910222, hh:=46 
23304: pop 
level 2:(h=0,v=9633792,w=0,x=0,y=1114112,z=0,hh=0,vv=488) 
23305: push 
level 2:(h=0,v=9633792,w=0,x=0,y=1114112,z=0,hh=0,vv=488) 
[ ]
23310: fnt1 72 current font is manual 
[x]
23313: pop 
level 2:(h=0,v=9633792,w=0,x=0,y=1114112,z=0,hh=0,vv=488) 
[ ]
23318: fntnum25 current font is ambx8 
[EXERCISE ]
23334: fntnum24 current font is ambx9 
[X.3]
23338: pop 
level 1:(h=0,v=9633792,w=0,x=0,y=1114112,z=0,hh=0,vv=488) 
23339: z3 720896 v:=9633792+720896=10354688, vv:=525 
23343: push 
level 1:(h=0,v=10354688,w=0,x=0,y=1114112,z=720896,hh=0,vv=525) 
[ ]
23348: fntnum1 current font is amr9 
[What would have happened if you had typed `]
23408: fntnum30 current font is amtt9 
[5]
23410: fntnum1 current font is amr9 
[' after the ]
23423: fntnum30 current font is amtt9 
[\vship ]
23431: fntnum1 current font is amr9 
[error?]
23438: pop 
level 1:(h=0,v=10354688,w=0,x=0,y=1114112,z=720896,hh=0,vv=525) 
23439: y0 1114112 v:=10354688+1114112=11468800, vv:=581 
23440: push 
level 1:(h=0,v=11468800,w=0,x=0,y=1114112,z=720896,hh=0,vv=581) 
23441: push 
level 2:(h=0,v=11468800,w=0,x=0,y=1114112,z=720896,hh=0,vv=581) 
23442: fntnum49 current font is manfnt 
23443: setchar127 h:=0+910222=910222, hh:=46 
23444: pop 
level 2:(h=0,v=11468800,w=0,x=0,y=1114112,z=720896,hh=0,vv=581) 
[ ]
23449: fntnum1 current font is amr9 
[You can control the level of interaction by giving commands in your ]
23532: setchar12 h:=21239316+336782=21576098, hh:=1093 
[le as]
23538: pop 
level 1:(h=0,v=11468800,w=0,x=0,y=1114112,z=720896,hh=0,vv=581) 
23539: z0 720896 v:=11468800+720896=12189696, vv:=618 
23540: push 
level 1:(h=0,v=12189696,w=0,x=0,y=1114112,z=720896,hh=0,vv=618) 
[ well as online: The ]
23574: fnt1 72 current font is manual 
[hijklmnj ]
23591: fntnum1 current font is amr9 
[primitives ]
23604: fntnum30 current font is amtt9 
[\scrollmode]
23616: fntnum1 current font is amr9 
[, ]
23622: fntnum30 current font is amtt9 
[\nonstopmode]
23635: fntnum1 current font is amr9 
[, and]
23641: pop 
level 1:(h=0,v=12189696,w=0,x=0,y=1114112,z=720896,hh=0,vv=618) 
23642: z0 720896 v:=12189696+720896=12910592, vv:=654 
23643: push 
level 1:(h=0,v=12910592,w=0,x=0,y=1114112,z=720896,hh=0,vv=654) 
23644: fntnum30 current font is amtt9 
[\batchmode ]
23659: fntnum1 current font is amr9 
[correspond respectively to typing `]
23703: fntnum30 current font is amtt9 
[S]
23705: fntnum1 current font is amr9 
[', `]
23710: fntnum30 current font is amtt9 
[R]
23712: fntnum1 current font is amr9 
[', or `]
23720: fntnum30 current font is amtt9 
[Q]
23722: fntnum1 current font is amr9 
[' in response to an error]
23754: pop 
level 1:(h=0,v=12910592,w=0,x=0,y=1114112,z=720896,hh=0,vv=654) 
23755: z0 720896 v:=12910592+720896=13631488, vv:=691 
23756: push 
level 1:(h=0,v=13631488,w=0,x=0,y=1114112,z=720896,hh=0,vv=691) 
[message, and ]
23776: fntnum30 current font is amtt9 
[\errorstopmode ]
23792: fntnum1 current font is amr9 
[puts you back into the normal level of interaction. (Such]
23861: pop 
level 1:(h=0,v=13631488,w=0,x=0,y=1114112,z=720896,hh=0,vv=691) 
23862: z0 720896 v:=13631488+720896=14352384, vv:=727 
23863: push 
level 1:(h=0,v=14352384,w=0,x=0,y=1114112,z=720896,hh=0,vv=727) 
[changes are global, whether or not they appear inside a group.) Furthermore, ]
[many]
23967: pop 
level 1:(h=0,v=14352384,w=0,x=0,y=1114112,z=720896,hh=0,vv=727) 
23968: z0 720896 v:=14352384+720896=15073280, vv:=764 
23969: push 
level 1:(h=0,v=15073280,w=0,x=0,y=1114112,z=720896,hh=0,vv=764) 
[installations have implemented a way to interrupt ]
24031: fnt1 72 current font is manual 
[hijklmnj ]
24048: fntnum1 current font is amr9 
[while it is running; such]
24078: pop 
level 1:(h=0,v=15073280,w=0,x=0,y=1114112,z=720896,hh=0,vv=764) 
24079: z0 720896 v:=15073280+720896=15794176, vv:=800 
24080: push 
level 1:(h=0,v=15794176,w=0,x=0,y=1114112,z=720896,hh=0,vv=800) 
[an interruption causes the program to revert to ]
24136: fntnum30 current font is amtt9 
[\errorstopmode]
24151: fntnum1 current font is amr9 
[, after which it pauses]
24179: pop 
level 1:(h=0,v=15794176,w=0,x=0,y=1114112,z=720896,hh=0,vv=800) 
24180: z0 720896 v:=15794176+720896=16515072, vv:=837 
24181: push 
level 1:(h=0,v=16515072,w=0,x=0,y=1114112,z=720896,hh=0,vv=837) 
[and waits for further instructions.]
24223: pop 
level 1:(h=0,v=16515072,w=0,x=0,y=1114112,z=720896,hh=0,vv=837) 
24224: down3 1179648 v:=16515072+1179648=17694720, vv:=897 
24228: push 
level 1:(h=0,v=17694720,w=0,x=0,y=1114112,z=720896,hh=0,vv=897) 
[ ]
24233: fntnum0 current font is amr10 
[What happens next in Experiment 5? ]
24282: fnt1 72 current font is manual 
[METAFONT ]
24299: fntnum0 current font is amr10 
[will hiccup on the]
24318: pop 
level 1:(h=0,v=17694720,w=0,x=0,y=1114112,z=720896,hh=0,vv=897) 
24319: y3 786432 v:=17694720+786432=18481152, vv:=936 
24323: push 
level 1:(h=0,v=18481152,w=0,x=0,y=786432,z=720896,hh=0,vv=936) 
[other bug that we planted in the ]
24364: setchar12 h:=9746368+364088=10110456, hh:=512 
[le. This time, however, the error message is]
24421: pop 
level 1:(h=0,v=18481152,w=0,x=0,y=786432,z=720896,hh=0,vv=936) 
24422: y0 786432 v:=18481152+786432=19267584, vv:=976 
24423: push 
level 1:(h=0,v=19267584,w=0,x=0,y=786432,z=720896,hh=0,vv=976) 
[more elaborate, since the context appears on six lines instead of two:]
24508: pop 
level 1:(h=0,v=19267584,w=0,x=0,y=786432,z=720896,hh=0,vv=976) 
24509: down3 6491704 v:=19267584+6491704=25759288, vv:=1305 
24513: push 
level 1:(h=0,v=25759288,w=0,x=0,y=786432,z=720896,hh=0,vv=1305) 
24514: push 
level 2:(h=0,v=25759288,w=0,x=0,y=786432,z=720896,hh=0,vv=1305) 
24515: down3 -5505024 v:=25759288-5505024=20254264, vv:=1026 
24519: push 
level 3:(h=0,v=20254264,w=0,x=0,y=786432,z=720896,hh=0,vv=1026) 
[ ]
24524: fntnum29 current font is amtt10 
[! Undefined control sequence.]
24557: pop 
level 3:(h=0,v=20254264,w=0,x=0,y=786432,z=720896,hh=0,vv=1026) 
24558: y0 786432 v:=20254264+786432=21040696, vv:=1066 
24559: push 
level 3:(h=0,v=21040696,w=0,x=0,y=786432,z=720896,hh=0,vv=1066) 
[ <argument> \bf A SHORT \ERROR]
24596: pop 
level 3:(h=0,v=21040696,w=0,x=0,y=786432,z=720896,hh=0,vv=1066) 
24597: y0 786432 v:=21040696+786432=21827128, vv:=1106 
24598: push 
level 3:(h=0,v=21827128,w=0,x=0,y=786432,z=720896,hh=0,vv=1106) 
[ STORY]
24609: pop 
level 3:(h=0,v=21827128,w=0,x=0,y=786432,z=720896,hh=0,vv=1106) 
24610: y0 786432 v:=21827128+786432=22613560, vv:=1146 
24611: push 
level 3:(h=0,v=22613560,w=0,x=0,y=786432,z=720896,hh=0,vv=1146) 
[ \centerline #1->\line {\hss #1]
24649: pop 
level 3:(h=0,v=22613560,w=0,x=0,y=786432,z=720896,hh=0,vv=1146) 
24650: y0 786432 v:=22613560+786432=23399992, vv:=1186 
24651: push 
level 3:(h=0,v=23399992,w=0,x=0,y=786432,z=720896,hh=0,vv=1186) 
[ \hss }]
24666: pop 
level 3:(h=0,v=23399992,w=0,x=0,y=786432,z=720896,hh=0,vv=1186) 
24667: y0 786432 v:=23399992+786432=24186424, vv:=1226 
24668: push 
level 3:(h=0,v=24186424,w=0,x=0,y=786432,z=720896,hh=0,vv=1226) 
[ l.3 \centerline{\bf A SHORT \ERROR STORY}]
24717: pop 
level 3:(h=0,v=24186424,w=0,x=0,y=786432,z=720896,hh=0,vv=1226) 
24718: down3 1572864 v:=24186424+1572864=25759288, vv:=1305 
24722: push 
level 3:(h=0,v=25759288,w=0,x=0,y=786432,z=720896,hh=0,vv=1305) 
[ ?]
24728: pop 
level 3:(h=0,v=25759288,w=0,x=0,y=786432,z=720896,hh=0,vv=1305) 
24729: pop 
level 2:(h=0,v=25759288,w=0,x=0,y=786432,z=720896,hh=0,vv=1305) 
24730: pop 
level 1:(h=0,v=25759288,w=0,x=0,y=786432,z=720896,hh=0,vv=1305) 
24731: pop 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
24732: eop 
 
24733: beginning of page 819 
24778: down3 2359296 v:=0+2359296=2359296, vv:=120 
24782: push 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
24783: down3 -1703936 v:=2359296-1703936=655360, vv:=33 
24787: push 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
[ ]
24793: fntnum36 current font is amti10 
[Experimental Pages for The T]
24829: push 
level 2:(h=20796027,v=655360,w=234473,x=-33497,y=0,z=0,hh=1054,vv=33) 
24834: down3 141084 v:=655360+141084=796444, vv:=40 
[E]
24839: pop 
level 2:(h=20796027,v=655360,w=234473,x=-33497,y=0,z=0,hh=1054,vv=33) 
[ Xbook]
24851: push 
level 2:(h=22735986,v=655360,w=234473,x=-33497,y=0,z=0,hh=1151,vv=33) 
[ ]
24856: fntnum23 current font is ambx10 
[819]
24860: pop 
level 2:(h=22735986,v=655360,w=234473,x=-33497,y=0,z=0,hh=1151,vv=33) 
24861: pop 
level 1:(h=0,v=655360,w=0,x=0,y=0,z=0,hh=0,vv=33) 
24862: pop 
level 0:(h=0,v=2359296,w=0,x=0,y=0,z=0,hh=0,vv=120) 
24863: down4 34603008 v:=2359296+34603008=36962304, vv:=1873 
24868: push 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
24869: down4 -33947648 v:=36962304-33947648=3014656, vv:=153 
24874: push 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
24875: push 
level 2:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
[ ]
24880: fntnum24 current font is ambx9 
[X.1.]
24885: pop 
level 2:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
[ ]
24890: fntnum1 current font is amr9 
[After an \isolated expression," ]
24929: fnt1 72 current font is manual 
[hijklmnj ]
24946: fntnum1 current font is amr9 
[thinks it is at the end of a state-]
24982: pop 
level 1:(h=0,v=3014656,w=0,x=0,y=0,z=0,hh=0,vv=153) 
24983: y3 720896 v:=3014656+720896=3735552, vv:=189 
24987: push 
level 1:(h=0,v=3735552,w=0,x=0,y=720896,z=0,hh=0,vv=189) 
[ment or command, so it expects to see a semicolon next. You should type, e.g.]
[,]
25092: pop 
level 1:(h=0,v=3735552,w=0,x=0,y=720896,z=0,hh=0,vv=189) 
25093: y0 720896 v:=3735552+720896=4456448, vv:=226 
25094: push 
level 1:(h=0,v=4456448,w=0,x=0,y=720896,z=0,hh=0,vv=226) 
[`]
25096: fntnum30 current font is amtt9 
[I; mode_setup]
25113: fntnum1 current font is amr9 
[' to keep ]
25127: fnt1 72 current font is manual 
[hijklmnj ]
25144: fntnum1 current font is amr9 
[happy.]
25156: pop 
level 1:(h=0,v=4456448,w=0,x=0,y=720896,z=0,hh=0,vv=226) 
25157: y3 1114112 v:=4456448+1114112=5570560, vv:=282 
25161: push 
level 1:(h=0,v=5570560,w=0,x=0,y=1114112,z=0,hh=0,vv=282) 
25162: push 
level 2:(h=0,v=5570560,w=0,x=0,y=1114112,z=0,hh=0,vv=282) 
[ ]
25167: fntnum24 current font is ambx9 
[X.2.]
25172: pop 
level 2:(h=0,v=5570560,w=0,x=0,y=1114112,z=0,hh=0,vv=282) 
[ ]
25177: fntnum1 current font is amr9 
[Yes.]
25186: pop 
level 1:(h=0,v=5570560,w=0,x=0,y=1114112,z=0,hh=0,vv=282) 
25187: y0 1114112 v:=5570560+1114112=6684672, vv:=339 
25188: push 
level 1:(h=0,v=6684672,w=0,x=0,y=1114112,z=0,hh=0,vv=339) 
25189: push 
level 2:(h=0,v=6684672,w=0,x=0,y=1114112,z=0,hh=0,vv=339) 
[ ]
25194: fntnum24 current font is ambx9 
[X.3.]
25199: pop 
level 2:(h=0,v=6684672,w=0,x=0,y=1114112,z=0,hh=0,vv=339) 
[ ]
25204: fnt1 72 current font is manual 
[hijklmnj ]
25224: fntnum1 current font is amr9 
[would have deleted ]
25249: setchar12 h:=11164563+336782=11501345, hh:=583 
[ve tokens: ]
25266: fntnum30 current font is amtt9 
[1]
25268: fntnum1 current font is amr9 
[, ]
25274: fntnum30 current font is amtt9 
[i]
25276: fntnum1 current font is amr9 
[, ]
25279: fntnum30 current font is amtt9 
[n]
25281: fntnum1 current font is amr9 
[,]
25283: push 
level 2:(h=16519923,v=6684672,w=265843,x=-16839,y=1114112,z=0,hh=838,vv=339) 
[ ]
25285: fntnum30 current font is amtt9 
25286: setchar32 h:=16785766+309657=17095423, hh:=867 
25287: pop 
level 2:(h=16519923,v=6684672,w=265843,x=-16839,y=1114112,z=0,hh=838,vv=339) 
[ ]
25292: fntnum1 current font is amr9 
[, ]
25295: fntnum30 current font is amtt9 
[\centerline]
25307: fntnum1 current font is amr9 
[. (The]
25317: pop 
level 1:(h=0,v=6684672,w=0,x=0,y=1114112,z=0,hh=0,vv=339) 
25318: down3 720896 v:=6684672+720896=7405568, vv:=375 
25322: push 
level 1:(h=0,v=7405568,w=0,x=0,y=1114112,z=0,hh=0,vv=375) 
[space was at the end of line 2, the ]
25365: fntnum30 current font is amtt9 
[\centerline ]
25378: fntnum1 current font is amr9 
[at the beginning of line 3.)]
25410: pop 
level 1:(h=0,v=7405568,w=0,x=0,y=1114112,z=0,hh=0,vv=375) 
25411: pop 
level 0:(h=0,v=36962304,w=0,x=0,y=0,z=0,hh=0,vv=1873) 
25412: eop 
Postamble starts at byte 25413.
maxv=37106483, maxh=22806528, maxstackdepth=5, totalpages=9
warning: observed maxh was 32523311
Font 72: manual 
Font 49: manfnt 
Font 37: amti9 
Font 36: amti10 
Font 33: amsl10 
Font 30: amtt9 
Font 29: amtt10 
Font 25: ambx8 
Font 24: ambx9 
Font 23: ambx10 
Font 22: amssqi8 
Font 20: amssq8 
Font 13: amsy9 
Font 12: amsy10 
Font 6: ammi10 
Font 3: amr7 
Font 1: amr9 
Font 0: amr10