18 
PEOFESSOR TYNDALL ON THE ABSORPTION AND 
Table VII. — Amylene. 
Unit-measure of ^ cubic inch. 
Absorption. 
Measures. 
Observed. 
Calculated, 
1 
3-4 
4-3 
2 
8-4 
8-6 
3 
12-0 
12-9 
4 
16-5 
17-2 
5 
21-6 
21-5 
6 
26-5 
25-8 
7 
30-6 
30-1 
8 
35-3 
34-4 
9 
39-0 
.38-7 
10 
44-0 
43-0 
For these quantities the absorption is proportional to the density, but for large quan- 
tities the usual deviation is observed, as shown by the following observations : — 
By mercurial gauge. 
Tension. Deflection. Absorption. 
^ inch 60 157 
1 inch 65 216 
Did the proportion hold good, the absorption for an inch of tension ought of course 
to be 314 instead of 216. 
Table VIII.— Iodide of Ethyl. 
Unit-measure i^th of a cubic inch. 
Absorption. 
Measures. 
Observed. 
Calculated. 
1 
5-4 
5-1 
2 
10-3 
10-2 
3 
16-8 
15-3 
4 
22-2 
20-4 
5 
26-6 
25-5 
6 
31-8 
30-6 
7 
35-6 
35-9 
8 
40-0 
40-8 
9 
44-0 
45-9 
10 
47-5 
51-0 
