486 
PROFESSOR GRAHAM ON THE DIFFUSION OF LIQUIDS. 
1. r003 per cent, of carbonate of soda, density 1‘01120, diffused at 63°'4, gave 
6'04 grs. for two cells ; calculated for 1 per cent., 6’02 grs. of carbonate of soda in 
two cells. 
2. 2*007 per cent, of carbonate of soda, density 1*0216, diffused at 63°*4, gave 
11*74 grs. for two cells ; calculated for 2 per cent., 11*70 grs. of carbonate of soda in 
two cells, 
3. 4*015 per cent, of carbonate of soda, density 1*04156, diffused at 63°*4, gave 
10*74 grs. for one cell; calculated for 4 per cent., 10*71 grs. of carbonate of soda in 
one cell. 
4. 8*03 per cent, of carbonate of soda, density 1*0800, diffused at 63°*4, gave 19*93 
grs. for one cell; calculated for 8 per cent., 19*87 grs. of carbonate of soda in one 
cell. 
In the two following additional experiments the diffusate was treated with hydro- 
chloric acid, and estimated from the weight of chloride of sodium produced. 
5. 2*007 pei‘ cent, of carbonate of soda, density 1*02166, diffused at 68°*1, gave 
12*06 grs. for two cells ; calculated for 2 per cent., 12*02 grs. of carbonate of soda in 
two cells at 68°*1, 
6. 2*13 per cent, of carbonate of soda, density 1*02246, diffused at 59°*6 in eight 
cells, 11*12, 11*34, 11*17, 11’58; mean 11*38 grs. for two cells; calculated for 2 per 
cent., 10*65 grs. of carbonate of soda in two cells at 59°*6. 
Diffusion of Carbonate of Soda in 9*9 days at 63°*4 ; two cells. 
Grs. 
Ratio. 
From 1 per cent, solution , 
. . 6*02 
1*028 
From 2 per cent, solution . 
. . 11*70 
2 
From 4 per cent, solution . 
. . 21*42 
3661 
From 8 per cent, solution . 
. . 39*74 
6*792 
The similarity of diffusion between the carbonates of potash and soda is remarkable 
in the 1 per cent, solution, which are as 6*13 to 6*02, or as 100 to 98*2 ; also in the 
2 per cent, solutions, which were observed at two different temperatures. 
Diffusion of 2 per cent, solutions of Carbonate of Potash in 8*083 days, 
and Carbonate of Soda in 9*9 days. 
Grs. 
Ratio. 
Carbonate of potash at 63°*7 . . 
. 11*92 
100 
Carbonate of soda at 63°*4 . . . 
. 11*70 
98*15 
Carbonate of potash at 68°*2 . . 
. 12*62 
100 
Carbonate of soda at 68°* 1 . . . 
. 12*02 
95*24 
