818 
PROFESSOR GRAHAM ON THE DIFFUSION OF LIQUIDS. 
17. Ch loride of Strontium . 
First time of diffusion 11‘43 days. The diffused salt was weighed as sulphate of 
strontia. 
1. Chloride of strontium, 0’803 per cent.; density 1-0076. Diffused at 51°, in 
eight cells, 6-36, 6-06, 5-93, 5’73 ; mean 6-02 grs. of chloride of strontium for two 
cells ; calculated for 1 per cent., 7'62 grs. at 51° for two cells. 
Second time of diffusion 8-57 days. 
2. Chloride of strontium, 1 per cent.; density 1-00936. Diffused at 63°, in eight 
cells, 6-10, 6-17, 6-02, 6-09 ; mean 6-09 grs. for two cells. 
3. Chloride of strontium, 2 per cent.; density 1-01806. Diffused at 63°, in eight 
cells, 11-62, 11-715 1T53, 1T79; mean 11-66 grs. for two cells. 
4. Chloride of strontium, 4-014 per cent.; density 1-03537. Diffused at 63°, in 
four cells, 1209, 1T75, 1T64, 11-79; mean ir82 grs. for one cell; calculated for 
4 per cent., II-78 grs. at 63° for one cell. 
5. Chloride of strontium, 8-028 per cent. ; density 1-06959. Diffused at 63°, in four 
cells, 22-29, 22-34, 22-03, 22-57 ; mean 22-31 grs. for one cell; calculated for 8 per 
cent., 22-23 grs. at 63° for two cells. 
Diffusion of Chloride of Strontium in 8-57 days at 63° ; two cells. 
Grs. 
Ratio. 
From 1 per cent, solution . 
. . 6-09 
1-045 
From 2 per cent, solution . 
. . 11-66 
2 
From 4 per cent, solution . 
. . 23-56 
4-041 
From 8 per cent, solution . 
. . 44-46 
7-626 
The series of ratios in the preceding table will be found on comparison to corre- 
spond closely with the ratios of chloride of barium. It may be useful to compare 
further the amounts diffused from similar solutions of these two isomorphous com- 
pounds. 
Diffusion in 8-57 days at 63° ; two cells. 
Chloride of barium, 1 percent. . 
6-32 
100 
Chloride of strontium, 1 per cent. . 
6-09 
96-36 
Chloride of barium, 2 per cent. . . 
12-07 
100 
Chloride of strontium, 2 per cent. . 
11-66 
96-90 
Chloride of barium, 4 per cent. . . 
23-96 
100 
Chloride of strontium, 4 per cent. . 
23-56 
99-16 
Chloride of barium, 8 per cent. . 
45-92 
100 
Chloride of strontium, 8 per cent. . 
44-46 
96-83 
The near coincidence of the 4 per cent, solutions probably arises from an accidental 
error of observation in the chloride of barium, for the latter departs here from the 
progression of its ratios. We appear then to have a small but constant difference of 
