370 
UR. J. P. JOULE OR A NEW DETERMINATION 
Experiments on Capacity for Heat of Calorimeter. 
No. 
W ater 
already in 
calorimeter. 
w. 
First 
temperature 
ot' calori- 
meter. 
T. 
Grains of 
water 
poured in. 
W. 
Temperature 
of water 
poured in. 
T\ 
Corrected 
resulting 
temperature. 
TL 
Thermal 
capacity of 
calorimeter. 
VV T") 
(T'-T.) ~ w - 
1 
323-2 
326-0 
78887-6 
457-63 
449-47 
4890-4 
2 
195-4 
322-36 
78996-6 
464-62 
456-5 
4586-6 
3 
225-9 
331-11 
78984-6 
475-84 
467-4 
4665'4 
4 
238-0 
336-94 
79042-6 
505‘36 
495-35 
4756-7 
5 
315-0 
358-0 
78916-8 
50404 
495-4 
4647-5 
6 
217-9 
354-1 
79029-6 
512-36 
502-13 
5243-6 
7 
182-1 
377-95 
79127-7 
514-1 
506-18 
4705-1 
8 
173-8 
382-7 
79044-7 
534-42 
525-29 
4887-4 
9 
198-8 
379-25 
79059-2 
613-83 
599-82 
4822-8 
10 
153-3 
362-5 
78959-2 
61404 
598-56 
5024-6 
11 
153-3 
363-0 
78920-2 
673-03 
654-57 
4841-3 
12 
182-3 
353-0 
78914-0 
641-11 
623-77 
4871-3 
13 
151-2 
35345 
78789-2 
658’06 
640-11 
4782-4 
14 
182-4 
343-68 
78574-0 
668 01 
649-02 
4704-3 
15 
146 9 
319-9 
78817-7 
654-83 
634-85 
4853-2 
16 
142-2 
308-0 
78933-2 
640-97 
621-13 
4859-0 
17 
1417 
291-75 
79021-7 
• 668-07 
646-07 
4764'8 
18 
128-3 
305-3 
78946-7 
647-78 
627-8 
4762-7 
19 
1371 
319-6 
78895-2 
681-64 
660-31 
4802-1 
20 
138-9 
330-1 
78821-7 
654-51 
635-38 
4800-4 
21 
151-4 
228-99 
78774-7 
624-35 
600-3 
4950-9 
22 
137-3 
201-16 
78996-2 
638-52 
612-66 
4827-1 
23 
144-3 
189-48 
78965-7 
637"71 
61118 
4823-6 
24 
163-7 
160-45 
78884-7 
636-91 
607‘95 
4941-3 
25 
125-6 
172-45 
78801-2 
643-44 
615-12 
4915-7 
26 
130-5 
196-24 
79026-7 
613-78 
589-46 
4757-2 
27 
141-4 
234-24 
79094-2 
66548 
640-53 
4715-7 
28 
119-3 
284-22 
79031-2 
669-39 
647-19 
4714-4 
29 
142-2 
236-34 
78913-2 
669-26 
643-56 
4838-1 
30 
132-9 
207-82 
78976-7 
662-14 
635‘38 
4810-0 
31 
125-8 
200-2 
79019-7 
674-56 
646-63 
4817-9 
32 
126-8 
217-38 
78915-7 
667-95 
641-0 
4893-7 
33 
120-9 
225-1 
78824-7 
672-3 
646-14 
4776-6 
34 
114-3 
210-75 
78986-2 
673-03 
646-03 
4785-1 
35 
131-2 
197-93 
78806-7 
648-93 
622-51 
4772-6 
86 
113-4 
235-0 
79024-2 
684-54 
658-32 
4781-3 
37 
121-3 
248-95 
78882-2 
675-41 
650-4 
4793-0 
38 
138-8 
258-63 
78865-7 
682-38 
657-24 
4835-2 
39 
127-3 
213-94 
78696-0 
682-26 
654-53 
4825-7 
40 
139-8 
218-6 
78811-7 
681-67 
654-57 
4759-2 
Average . 
278-91 
624-71 
604-25 
4815-15 
The average temperatures T and T" are 78 0, 38 and 7G° - 8. Hence in order to 
express the foregoing result in terms of the capacity of a grain of water at 60°, we 
have, from the experiments of Begnault, 481505 X 1 ’00 132= 4821*5. Two further 
corrections were needed, one amounting, as was ascertained by means of experiments 
devised for the purpose, to 1 7*6, on account of the time allowed before the final reading 
of 1 ", limited to 8 m , not being sufficient to enable the caoutchouc stoppers and boxwood 
appendages to receive what would be their ultimate thermal distribution ; the other, 
