PROFESSOR TYNDALL’S CONTRIBUTIONS TO MOLECULAR PHYSICS. 
333 
Table III. (continued). 
Name of liquid. 
Deflection. 
Absorption per 100. 
Benzol 
. . 39-2 
62-5 65-7 
Amylene 
. . 42-0 
73-6 72-3 
Sulphuric Ether 
. . 42-6 
76T 77-4 
Acetic Ether 
. . 43-4 
78-0 79-3 
Formic Ether 
. . 43-3 
79-0 80-0 
Alcohol 
. . 44-4 
83-6 85-4 
Water 
. . 45-6 
88-8 90-9 
Total heat ........ 
. . 48-0 
100-0 
I have here placed beside the results obtained with the delicate galvanometer, the 
means of those obtained with the coarser 
one. It is not 
my object to push these 
measurements to the last degree of nicety; 
otherwise the s 
satisfactory agreement here 
exhibited might be made still better. 
To render the experiments on liquid transmission more 
complete, I operated with 
layers of various thicknesses, employing throughout my most delicate galvanometer. 
The results of these measurements are recorded in the following series of Tables : — 
Table IV. — Radiation of heat through Liquids. Source, 
red-hot platinum spiral. 
Thickness of liquid layer 0-02 of an inch. 
Name of liquid. 
Deflection. 
Absorption per 100. 
Bisulphide of Carbon . . 
O 
4-0 
5-5 
Chloroform 
12-0 
16-6 
Iodide of Methyl 
26-0 
36-1 
Iodide of Ethyl .... 
27-5 
38-2 
Benzol 
31-3 
43-4 
Amylene 
38-0 
58*3 
Boracic Ether .... 
39-0 
61-8 
Sulphuric Ether .... 
39-5 
63-3 
Formic Ether .... 
40-0 
65-2 
Alcohol 
40-5 
67-3 
Water 
43-7 
80-7 
Total heat 
48-0 
100-0 
Table V. — Thickness of liquid layer 0-04 of an inch. 
Name of liquid. 
Deflection. 
Absorption per 100. 
Bisulphide of Carbon . . 
. 6-1 
8-4 
Chloroform . 
. 18-0 
25-0 
Iodide of Methyl 
. 33-0 
46-5 
Iodide of Ethyl .... 
. 35*0 
50-7 
