ON EVAPORATION AND DISSOCIATION. 
141 
Constants with the largest quantity, A.—The vapour-pressures at each temperature 
were, as usual, determined at the widest possible limits of volume. 
Volume of 1 grm. at 23°'7 = 1'2493. Specific gravity 0'8004. 
The pure liquids employed for obtaining constant temperatures were carbon bisul¬ 
phide, ethyl alcohol, chlorobenzene, bromobenzene, aniline, methyl salicylate, and 
bromonaphthalene (‘Chem. Soc. Trans.,’ 1885, p. 640). We think it unnecessary to 
state in each case the liquid employed and the pressure under which it boiled. 
Temperature. 
Volume of 1 grm. 
Specific gravity. 
(Weight of 1 e.c.) 
Pressure. 
O 
c.cs. 
mms. 
30 
1-2569 
0-7956 
800 
1-2522 
32,590 
40 
1-2712 
0-7866 
800 
1-2659 
22,910 
1-2612 
53,480 
.50 
1-2850 
0-7782 
800 
1-2796 
19,730 
1-2743 
•• 
53,480 
60 
1-2992 
0-7697 
800 
1-2934 
23,730 
1-2873 
63,480 
70 
1-3137 
0-7612 
800 
1-3070 
26,210 
1-3017 
53,480 
80 
1-3298 
0-7520 
800 
1-3274 
6,750 
1 -.3207 
29,090 
1-3180 
53,480 
90 
1-3742 
0-7423 
800 
1-3412 
17,070 
1-3346 
37,970 
100 
, , 
8421 
843 
842 
r 
843J 
Mean vap.-press. 
= 842-5 
1-3651 
0-7326 
800 
1-3618 
11,510 
1-3550 
31,910 
1-3483 
53,480 
no 
1,2041 
1,207 
1,205 
r 
1,207 J 
Mean vap.-press. 
= 1,206 
1-.3863 
0-7214 
1,200 
1-3822 
7,415 
1-3754 
27,910 
1-3687 
47,480 
