22 
MR. J. W. CAPSTICK ON THE RATIO OF THE SPECIFIC HEATS 
The densities used in the calcnlation of the ratio of the specific heats are taken 
from this curve. 
The correction factors are determined in exactly the same way as was explained 
under methyl chloride. 
It is needless to give the intermediate tables and curves in every case, so, for the 
remaining gases, I shall content myself with giving the experimental data from 
which the correction was calculated, and its value. 
The following table gives the final results for methyl bromide :— 
Table VIII. 
p- 
t. 
1 . 
V. 
0- 
1 ^ ld{pv) 
p dv 
7- 
255 
19-4 
25-58 
48-96 
3-278 
1-013 
1-277 
812 
15-9 
25-.34 
48-62 
3-286 
1-014 
1-274 
440 
20 
25-40 
48-96 
3-302 
1-015 
1-270 
530 
15-8 
25-20 
48-61 
3-314 
1-016 
1-274 
Mean . 
1-274 
7. Methyl Iodide. 
The material was purchased from Kahlbaum, and was dried with calcium chloride 
and fractionated. 
Table IX. and fig. 9 show the results of three vapour density determinations. 
Table X. gives the final results, the columns having the same meanings, and being 
obtained in the same way as before. 
Table IX. 
t. 
o. 
179 
15-6 
4-914 
217 
16-4 
4-939 
255 
16-1 
4-969 
