PROFESSOR GRAHAM ON THE DIFFUSION OF LIQUIDS. 
493 
Acetate of Soda. — Time of diffusion 9’9 days. The diffiisate was converted into 
chloride of sodium and weighed in that form. 
1. 0‘958 per cent, of anhydrous acetate of soda, density r00530, diffused at 59° 6, 
in eight cells, 6*33, 6'56, 6'63, 6‘05 ; mean 6*39 grs. for two cells ; calculated for 
1 per cent., 6‘67 grs. of acetate of soda in two cells. 
2. 1*917 per cent, of acetate of soda, density 1*01032, diffused at 59°*6, in eight cells, 
11*70, 12*04, 11*90, 12*19; mean 11*96 grs. for two cells; calculated for 2 per cent., 
12*46 grs. of acetate of soda in two cells. 
3. 3*835 per cent, of acetate of soda, density 1*02039, diffused at 59°*6, in four cells, 
12*19, 11*74, 12*15, 11*93; mean 12*00 grs. for one cell ; calculated for 4 per cent., 
12*52 grs. of acetate of soda in one cell. 
4. 7’67 per cent, of acetate of soda, density 1*03968, diffused at 59°*6, in four cells, 
23*49, 22*26, 23*87, 22*49 ; mean 23*03 grs. for one cell ; calculated for 8 per cent., 
24*02 grs. of acetate of soda in one cell at 59°*9 
Diffusion of Acetate of Soda in 9*9 days at 59°*6 ; two cells. 
Grs. 
Ratio. 
From 1 per cent, solution . 
. . 6*67 
1*070 
From 2 per cent, solution . 
. . 12*46 
2 
From 4 per cent, solution . 
. . 25*04 
4*019 
From 8 per cent, solution . 
. . 48*04 
7*711 
The diffusion of acetate of soda presents a general parallelism to that of acetate of 
potash for the times chosen, the temperatures of the two series of experiments differ- 
ing only 0°*7. 
Comparative diffusion of Acetate of Potash in 8*083 days at 60°*3, 
and Acetate of Soda in 9*9 days at 59°*6. 
From solutions of 
1 per cent. 
2 per cent. 
4 per cent. 
8 per cent. 
Acetate of potash 
100 
103-57 
100 
99*52 
100 
106-82 
100 
101=65 
Acetate of soda 
Tartrate of Potash. — Time of diffusion 8*08 days. The diffusate was evaporated 
to dryness, ignited, and then converted into chloride of potassium. 
1*82 per cent, of anhydrous tartrate of potash, density 1 * 01227 , diffused at 59°*9, 
in eight cells, 9*96, 10*02, 10*06, 9*87 ; mean 9*98 grs. for two cells ; calculated for 
2 per cent., 10*96 grs. of tartrate of potash in two ceils. 
Tartrate of Soda. — Time of diffusion 9*9 days. The diffusate was evaporated to 
dryness, ignited, and then converted into chloride of sodium. 
2*03 per cent, of anhydrous tartrate of soda, density 1*01460, diffused at 59°‘6, in 
3 s 
MDCCCLI. 
