RADIATION OF HEAT BY GASES AND VAPOURS. 
21 
Up to the 10th measure, or thereabouts, the proportion between density and absorp- 
tion holds good, from which onwards the deviation from the law gradually augments. 
By mercurial gauge. 
Tension. Deflection. Absorption. 
inch 54 78 
1 inch 57 103 
Table XIII. — Methylic Alcohol. 
Unit-measure iijth of a cubic inch. 
Absorption. 
Measures, 
Observed. 
Calculated. 
1 
10-0 
10-0 
2 
20-0 
20-0 
3 
80-0 
30-0 
4 
40*5 
40-0 
5 
49-0 
50-0 
6 
53-5 
60*0 
7 
59-2 
70-0 
8 
71-5 
80-0 
9 
78-0 
90-0 
10 
84-0 
100-0 
By mercurial gauge. 
Tension. 
Deflection. 
Absorption. 
^ inch 
58-8 
133 
1 inch 
60-5 
168 
Table XIV. — Formic Ether. 
Unit-measure -j^th of a cubic inch. 
Absorption. 
A 
Measures. 
r 
Observed. 
Calculated. 
1 
8 
7-5 
2 
16 
15-0 
3 
22-5 
22-5 
4 
30-0 
30-0 
5 
35-2 
37-5 
6 
39-5 
45-0 
7 
45-0 
52-5 
8 
48-0 
60-0 
9 
50-2 
67-5 
10 
53-5 
75-0 
