492 
PROFESSOR GRAHAM ON THE DIFFUSION OF LIQUIDS. 
The comparative diffusion from 1 per cent, solutions of these alkaline oxalates is as 
follows : — 
' Oxalate of potash in 8*083 days at 59°*9 .... 6*20 100 
Oxalate of soda in 9*9 days at 59°*9 6*24 100*65 
Here again a nearly equal diffusion is observed in times of which the squares are 
as 2 to 3. 
Acetate of Potash . — Time of diffusion 8*083 days. The diflfusate was converted 
into chloride of potassium and weighed in that form. 
1. 0*951 per cent, of anhydrous acetate of potash, density 1*00540, diffused at 60°*3, 
in eight cells, 6*01, 6*18,6*27, 6*06; mean 6*13 grs. for two cells; calculated for 
1 per cent., 6*44 grs. of acetate of potash in two cells. 
2. 1*903 per cent, of acetate of potash, density 1*00976, diffused at 60°*3, in eight 
cells, 11*90, 11*91, 11*65, 12*24; mean 11*92 grs. for two cells; calculated for 2 per 
cent., 12*52 grs. of acetate of potash in two cells. 
3. 3*807 pel' cent, of acetate of potash, density 1*01928, diffused at 60°*3, in four 
cells, 10*91, 11*08, 11*48, 11*18; mean 11*16 grs. for one cell; calculated for 4 per 
cent., 11*72 grs. of acetate of potash in one cell. 
4. 7'614 per cent, of acetate of potash, density 1*03743, diffused at 60°*3, in four 
cells, 22*62, 21*72, 23*23, 22*42; mean 22*50 grs. for one cell; calculated for 8 per 
cent., 23*63 grs. of acetate of potash in one cell. 
Diffusion of Acetate of Potash in 8*08 days at 60°*3 ; two cells. 
Grs. 
Ratio. 
From 1 per cent, solution . 
. . 6*44 
1*028 
From 2 per cent, solution . 
. . 12*52 
2 
From 4 per cent, solution . 
. . 23*44 
3*744 
From 8 per cent, solution . 
. . 47*26 
7*549 
The acetate will be found to exceed sensibly the sulphate and oxalate of potash in 
diffusibility at the preceding temperature. 
Comparative diffusion of Sulphate and Acetate of Potash in 8*083 days, at 60°*3. 
From solutions of 
1 per cent. 
2 per cent. 
4 per cent. 
8 per cent. 
Sulphate of potash 
100 
104-55 
100 
107*93 
100 
103-26 
100 
107*58 
Acetate of potash 
The acetate of potash appears to possess that increased diffusibility which is ob- 
served in bicarbonate of potash. But a parallelism still holds between the acetate 
and sulphate, and the diffusion of the two salts would probably coincide if that of the 
acetate were observed at a temperature 3° or 4° lower than the sulphate. 
