26 
PEOPESSOE TYNDALL ON THE ABSOEPTION AND 
Up to a tension of 3^ inches the absorption by carbonic oxide is proportional to the 
density of the gas. But this proportion does not obtain with large quantities of the 
gas, as showTi by the following Table : — 
Tension in inches. 
Deflection. 
Absorption. 
5 
18-0 
18 
10 
32-5 
32-5 
15 
41-0 
45 
Table XX. — Carbonic Acid. 
Absorption. 
A _ 
Tension in inches. 
r 
Observed. 
Calculated. 
0-5 
5-0 
3-5 
1-0 
7-5 
7-0 
1-5 
10-5 
10-5 
2-0 
14-0 
14-0 
2-5 
17-8 
17-5 
3-0 
21-8 
21-0 
3'5 
24-5 
24-5 
Here we have the proportion exhibited, but not 
so with larger quantities. 
Tension in inches. 
Deflection. 
Absorption. 
5 
25-0 
25 
10 
36-0 
36 
15 
42-5 
48 
Table XXI. — Sulphuretted Hydrogen. 
Absorption. 
Tension in inches. 
( 
Observed. 
• M , . 
Calculated. 
0-5 
7-8 
6 
1-0 
12-5 
12 
1-5 
18-0 
18 . 
2-0 
24-0 
24 
2-5 
30-0 
30 
3-0 
34-5 
36 
3-5 
36-0 
42 
4-0 
36-5 
48 
4-5 
38-0 
54 
5-0 
40-0 
60 
had been purified with great care, but the latter was not pure. Both specimens, however, went under the 
common name of methylic alcohol. I have had a special apparatus constructed with a view to examiue the 
influence of ozone on the interior of the experimental tube. 
