330 
MR. J. P. JOULE AND PROFESSOR THOxMSON ON THE 
Table VIII. — Carbonic acid forced through a plug of 382 grs. of cotton wool. 
Mean barometric pressure 29"45 inches, equivalent to 14-399 lbs. Gauge under 
atmospheric pressure 151. The pump was placed in connexion with the pipe 
immersed in carbonic acid at 10 h 55 m . 
1. 
2 . 
3 . 
4 . 
5 . 
6 . 
Time of 
observa- 
tion. 
Volume per- 
centage of car- 
bonic acid. 
Pressure-gauge ; mean pres- 
sure in lbs. on the square 
inch. 
Temperature of the bath, by 
indications of thermometer. 
Temperature of the issuing 
gas, by indications of 
thermometer. 
Cooling 
effect in 
Cent, 
degrees. 
h m 
10 47 
0 
79-0 
486-0 
198-5 
49 
0 
79-0 
486-0 
198-5 
53 
0 
79-6 
486-0 
198-2 
57 
85-2 
486-0 
195-0 
58 
86-0 
486-0 
186-0 
59 
85 - 0 q 
486 - 0 ') 
188-6 ") 
11 0 
95-51 
85-0 
486-0 
188-5 
2 
86-4 
486-0 
187-6 
4 
86-7 
486-0 
187-8 
6 
86-6 
* 
486-0 
188-9 
9 
95-51 
86-6 
486-0 
188-9 
13 
84-0 
486-0 
188-65 
14 
84-2 
lbs. 
486-0 
188-1 
15 
95-51 
> 94-89 
84-4 
> 84 - 906 = 32-989 
486-0 
> 486-00 = 20-001 
188-0 
> 188 - 36 = 18-611 
1-390 
19 
84-5 
486-0 
188-0 
22 
84-1 
486-0 
188-1 
24 
84-6 
486-0 
188-3 
25 
93-03 
84-2 
486-0 
188-5 
28 
84-1 
486-0 
188-6 
32 
83-2 J 
486-0 
188-9 J 
33 
83 - 8 *] 
486-0 ) 
188-9 ] 
35 
86-82 
84-0 
486-0 
189-0 
40 
83-8 
486-0 
189-6 
41 
83-9 
486-0 
189-7 
43 
85-0 
485-9 
189-9 
45 
79-37 
C O 
O 
OO 

86-0 
]> 84-245 = 33-286 
485-9 
^ 485-94 = 19-998 
190-4 
]> 190-1 = 18-787 
1-211 
49 
84-6 
485-9 
190-8 
51 
84-5 
485-9 
190-8 
53 
83-9 
485-9 
190-6 
55 
75-65 
83-6 
485-9 
190-6 
12 0 
2 
83 - 6 j 
83 - 0 ^ 
485 - 9 J 
485 - 7 '] 
190-8 
190-8 ^ 
5 
70-68 
82-7 
485-7 
190-9 
9 
13 
> 68-82 
82-7 
82-9 
> 82-783 = 33-960 
485-4 
485-4 
. 485-52 = 19-980 
190-8 
191-1 
> 191-07 = 18*884 
1-096 
15 
66-96 
82-7 
82-7 
i 
485-5 
191-3 
21 
485-4 
191-5 
23 
82 - 8 ' 
485 - 4 ^ 
191 - 55 ' 
25 
65-72 
82-9 
485-4 
191-6 
28 
82-9 
485-4 
191-7 
33 
82-2 
485-4 
191-8 
35 
63-23 
82-3 
485-4 
191-7 
40 
81-9 
485-3 
191-65 
44 
81-9 
485-2 
191-6 
45 
63-23 
163-85 
82-1 
|> 82-986 = 33-864 
485-2 
^ 485-18 = 19-966 
191-6 
> 191 - 82 = 18-959 
1-007 
52 
82-4 
485-0 
191-65 
55 
62-0 
83-9 
485-0 
192-0 
1 2 
84-1 
485-0 
192-1 
5 
63-23 
84-9 
485-0 
192-1 
11 
85-4 
485-0 
192-3 
15 
65-72 
82-1 
484-9 
192-1 
