OF THE MECHANICAL EQUIVALENT OF HEAT. 
370 
Table TIT , j Part 1 . Experiments to asceitam tlie hiffcct of* dtadiation, &c. time 
occupied by each experiment, 41 m . Weight raised for an instant, 16477*4 grains. 
No. 
Revo- 
lutions 
r. 
Mean 
temperature 
of calori- 
meter. 
Mean 
temperature 
of air. 
Difference. 
Rise of 
temperature 
of calori- 
meter. 
Correction 
to air 
temperature. 
Thermal effect 
of unit 
difference of 
temperature. 
la 
lb 
19'0 
19-5 
385"5"26 
432-690 
427-236 
424-879 
41-710 + 
7-811- 
4-05 + 
0-62- 
J 1-237 + 
0-1060 
2a 
2b 
18- 58 
19- 42 
366'510 
409-710 
376-830 
386-590 
10-320 + 
23-120- 
1-02 + 
2-08- 
j 0-683 + 
0-0927 
3 a 
3b 
18-75 
20-33 
338-865 
386-535 
364-127 
368-066 
25-262 + 
18-469- 
2-325 + 
1-567- 
| 0-862 + 
0-0890 
4 a 
4b 
19- 5 
20- 75' 
339-675 
385-410 
368-504 
372-488 
28-829 + 
12-922 — 
2-51 + 
1-18- 
Jo-429- 
0-0884 
5 a 
5 b 
19-17 
19-31 
357-290 
402-025 
378-033 
386-340 
20-743 + 
15-685- 
1-78 + 
1-35- 
J 0-027- 
0-0859 
6 a 
6b 
20-67 
20-93 
357-885 
404-650 
389-996 
397-150 
32-111 + 
7-500- 
2-97 + 
0-60- 
} 0-843 + 
0-0901 
7a 
7b 
19-33 
19-75 
355-780 
401-960 
383-923 
389-234 
28-143 + 
12-726- 
2-56 + 
1-08- 
} 0-600 + 
0-0891 
8a. 
8b 
19-4 
21-2 
878-970 
421-730 
388-517 
392-446 
9-547 + 
29-284- 
0-90 + 
2-54- 
J 0-612 + 
0-0886 
9 a 
9b 
19- 46 
20- 0 
342-575 
387-000 
361-843 
369-210 
19-268 + 
17-790- 
1-83 + 
1-60- 
J 0-503 + 
0-0926 
10a 
106 
18-83 
20-43 
347-205 
391-930 
369-358 
373-889 
22-153 + 
18-041- 
1-75 + 
] -46— 
J 0-240- 
0-0799 
11a 
116 
19-0 
19-0 
349-530 
395-970 
378-721 
386-502 
29-191 + 
9 '468 — 
2-78 + 
0-74- 
J 1-341 + 
0-0911 
12a 
126 
19-0 
19-0 
344-970 
393-040 
383-753 
390-749 
38-783 + 
2-291- 
3-54 + 
0-08- 
} L383 + 
0-0881 
13a 
136 
18-0 
17-75 
348-125 
393-550 
372-988 
380-002 
24-863 + 
13-548- 
2-17 + 
1-10- 
} 0-627 + 
0-0851 
14a 
146 
18-12 
17-0 
346-520 
393-310 
378-315 
386-409 
31-795 + 
6-901 — 
3-00 + 
0-52- 
J 1-185 + 
0-0910 
15a 
156 
17-73 
19-23 
356-395 
404-170 
390-069 
400-922 
33-674 + 
3-248- 
3-49 + 
0-26- 
J 0-688 + 
0-1016 
16a 
166 
18-0 
16-72 
345-085 
392-365 
380-701 
386-442 
35-616 + 
5-923- 
3-17 + 
0-47- 
J 0-560 + 
0-0876 
17a 
176 
19-0 
18-0 
366-715 
411-775 
388-706 
395-102 
21-991 + 
16-673- 
1-93 + 
1-45- 
J 0-086 + 
0-0874 
18a 
186 
19-57 
18-97 
374-230 
420-020 
400'624 
408-859 
26-394 + 
11-161- 
2-46 + 
0-90- 
} 1-102 + 
0-0895 
19a 
196 
18- 72 
19- 0 
396-755 
440-415 
412-830 
415-996 
16075 + 
24-419- 
1- 49 + 
2- 15- 
} 0-501 + 
0-0899 
20a 
206 
19-33 
17-77 
367-770 
415-070 
403-836 
411-934 
36'066 + 
3136- 
3-46 + 
0-14- 
} 1-611 + 
0-0918 
21a 
216 
17- 0 
18- 3 
386-805 
433-470 
415-792 
426-345 
28-987 + 
7-125- 
2-93 + 
0-58- 
J 1-158 + 
0-0972 
