THE THEEMAL EEEECTS OE ELIJIDS IN MOTION. 
583 
Table IV. 
No. of experiment. 
Cubical inches 
of elastic fluid trans- 
mitted per minute. 
Composition of the 
elastic fluid. 
Pressure over that of 
the atmosphere, 
in inches of mercm-y. 
Temperature of the 
bath. 
Thermal effect. 
Correction on 
account of conduc- 
tion of heat. 
Corrected thermal 
effect. 
Thermal effect 
reduced to the 
pressure of 100 
inches of merciu-y. 
Ditto, calculated for 
pure carbonic acid, 
calling its sp. heat for 
equal vol. 1-39. 
Time occupied by 
experiment, 
in minutes. 
Number of observa- 
tions comprised in 
each mean. 
Extreme range 
of the temperature 
of the bath. 
Extreme range 
of the temperature 
of the elastic fluid. 
Extreme range 
of the prossiu-p. 
1 
2450 
f 68-42 Air 
31-58 CO, 
163-7 
7-362 
-§-699 
-0-190 
-2°889 
-1-765 
-3T66 
12 
10 
O 
0 
0-16 
3-2 
2 
2350 
[89-16 Air 
10-84 CO, 
148-82 
7-360 
-1-621 
-0-125 
- 1-746 
-M73 
-2-990 
14 
10 
0-004 
0-282 
9-2 
3 
3100 
f 3-52 iir 
[ 96-48 COj 
164-07 
7-384 
-6-719 
-0-299 
-7-018 
-4-277 
-4-367 
6-5 
6 
0-008 
0-021 
1-4 
4 
2500 
f 62-5 Air 
37-5 CO, 
162-925 
7-407 
-2-839 
-0-191 
-3-030 
-1-860 
-3-052 
8 
8 
0-007 
0-11 
5-8 
5 
2300 
[88-13 Air 
[11-87 CO^j 
158-08 
7-433 
-1-682 
-0-132 
-1-814 
-M47 
-2-648 
10 
10 
0-005 
0-107 
5-2 
6 
2260 
[97-46 Air 
[ 2-54 CO, j 
163-52 
7-608 
-1-407 
-0-116 
-1-523 
-0-931 
-2-753 
8 
8 
0-007 
0-064 
2-0 
r 4-0 Air" 
7 
3300 
1 
5-286 H 
90-714 CO, 
161-97 
7-960 
-6-131 
-0-262 
-6-393 
-3-947 
-4-215 
6 
8 
0 
0-18 
4-8 
4-23 Air 
8 
3000 
i 
46-47 H 
49-3 CO, 
7-09 Air 
153-72 
8-020 
-2-189 
-0-117 
-2-306 
-1-500 
-2-631 
5 
5 
0 
0-19 
1-6 
9 
1500 
I 
67-05 H 
25-86 CO, 
97-56 
8-296 
-0-543 
-0-063 
-0-606 
-0-622 
-1-940 
15 
15 
0-012 
0-146 
5-4 
10 
2925 
i 
2-11 Air 
[ 97-89 CO, J 
167-25 
93-523 
-3-418 
-0-160 
-3-578 
-2-139 
-2-164 
10 
10 
0-382 
0-49 
4-0 
11 
2925 
[56-78 Air 
[43-22 CO, 
167-4 
91-26 
-1-746 
-0099 
-1-845 
-1-102 
-1-674 
30 
20 
0-292 
0-49 
11-0 
12 
2925 
[77-77 Air 
[22-23 CO, 
146-83 
91-642 
-1-292 
-0077 
-1-369 
-0-938 
-2-053 
9 
6 
0-045 
0-245 
3-5 
13 
5500 
r 0-83 Air 1 
99-17 CO, 
146 
54-0 
-4-184 
-0-104 
-4-288 
-2-937 
-2-951 
24 
16 
0-24 
0-46 
0 
14 
5300 
67-7 Air 
[32-3 CO, J 
147 
49-703 
-1-832 
-0-059 
-1-891 
-1-286 
-2-225 
24 
16 
0-025 
0-17 
0 
15 
5600 
[ 87-77 Air" 
12-23 CO, 
145 
49-764 
;-l-250 
-0-032 
-1-282 
-0-884 
-2-025 
20 
16 
0-01 
O-ll 
0 
16 
5100 
1-83 Air 
98-17 CO, 
127-5 
35-604 
-4-186 
-0-112 
-4-298 
-3-371 
-3-407 
18 
15 
0-03 
0-095 
0 
17 
5000 
1 
r 1-66 Air" 
^98-34 CO, J 
1 
151 
97-553 
-3-11 
-0084 
-3-194 
-2-115 
-2-135 
20 
16 
0-292 
0-272 
0 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
15 
Hydrogen. 
Our method in procuring this elastic fluid was to pour sulphuric acid, prepared from 
sulphur, into a carboy nearly filled with water and containing fragments of sheet zinc. 
The gas was passed through a tube filled with rags steeped in a solution of sulphate of 
copper, and then through a tube filled with sticks of caustic ]Dotash. The rags became 
speedily browned, and we therefore adopted the plan of pouring a small quantity of 
solution of sulphate of copper from time to time into the carboy itself. This succeeded 
perfectly ; the rags retained their blue colour, and the gas was rendered perfectly inodo- 
rous, whilst at the same time its evolution became much more free and regular. 
