38 
Proceedings of the Boyal Society 
XIX. Mixture of Air and Olefiant Gas, containing *06 per cent, 
hy volume of Olefiant Gas . — The mixture of dry air and olefiant gas 
used in Experiment XVIII. was driven out of the absorber by a 
current of dry air, which was drawn through the absorber for 
about twenty hours. When both compartments of the jacket had 
been filled with cold water, and B and C closed, the pressure took 
the constant value 9289*2. Dry olefiant gas was then driven into 
the absorber until the pressure took the constant value 9295*4. 
The gas which filled the absorber contained therefore *05996 or 
about *06 per cent, by volume of olefiant gas. The temperature of 
the gas at starting was 12°*9 C. 
Time. 
Pressure. 
Time. 
Pressure. 
m. 
s. 
m. 
s. 
0 
0 
9299*6 
5 
40 
9349*1 
0 
22 
9298*7 
5 
55 
9354*2 
0 
48 • 
9298*7 
a 
j Steam issuing 
1 
10 
9298*5 
D 
D 
1 freely. 
1 
30 
9299*9 
6 
20 
9359*4 
1 
43 
9301*0 
6 
37 
9364*5 
2 
0 
9303*1 
7 
0 
9369*6 
2 
16 
9306*1 
7 
32 
9371*6 
2 
28 
9308*2 
7 
47 
9375*8 
2 
55 
9313*3 
8 
27 
9377*1 
3 
20 
9318*4 
10 
35 
9378*3 
3 
45 
9323*5 
12 
32 
9379*8 
4 
13 
9328*7 
14 
10 
9381*2 
4 
35 
9333*8 
18 
10 
9383*0 
4 
57 
9338*8 
20 
54 
9383*4- 
5 
15 . 
9344*0 
XX. Mixture of Air and Olefiant Gas, containing *06 per cent, 
hy volume of Olefiant Gas . — The absorber contained the gas used in 
Experiment XIX. Both compartments of the jacket having been 
filled with water at 12°*8 C., and the pressure having taken a 
constant value, the steam was turned on in the radiator. 
Time. 
m. 
0 
0 
16 
Pressure. 
Time. 
Pressure. 
m. 
s. 
9296*1 
0 
24 
9294*3 
9295*3 
0 
30 
9293*3 
