71 



Diffusion of hydrate of potash in 4*04< days at 63°*4? : two cells. 



Grs. Ratio. 



From 1 per cent, solution 6*56 1*022 



„ 2 „ „ 12-84 2- 



4 „ „ 25-04 S-900 



„ 8 „ „ 52-24 8-137 



Diffusion of hydrate of soda in 4*937 days at 63°-3 : two cells. 



Grs. Ratio. 



From 1 per cent, solution 5*81 1*048 



„ 2 „ „ 11-09 2- 



„ 4 „ „ 20-86 3-765 



„ 8 „ „ 40*44? 7-30 



The nearest approach to equality of diffusion in the hydrates of 

 potash and soda is exhibited by the 1 per cent, solutions, which are 

 as 6*56 to 5*81, or as 100 to 88*57. 



Diffusion of carbonate of potash in 8*083 days, double the time of 

 hydrate of potash, at 63^*7 : two cells. 



Grs. Ratio. 



From 1 per cent, solution 6*13 1028 



„ 2 „ „ 11-92 2* 



„ 4 „ „ 22*88 3*839 



„ 8 „ „ 45*44 7*624 



Diffusion of carbonate of soda in 9*875 days, double the time of 

 hydrate of soda, at 63°*4 : two cells. 



Grs. Ratio. 



From 1 per cent, solution 6*02 1*028 



„ 2 „ „ 11*70 2- 



„ 4 „ „ 21*42 3*661 



„ 8 „ „ 39*74 6*792 



The diffusion of carbonate of potash appears similar to that of the 

 carbonate of soda in the 1 and 2 per cent, solutions, but they diverge 

 in the 4 and 8 per cent, solutions. 



Diffusion of sulphate of potash in 8*083 days at 60°*3 : two cells, 



Grs. Ratio. 



From 1 per cent, solution 6*16 1*062 



„ 2 „ „ 11-60 2- 



„ 4 „ „ 22*70 3*914 



„ 8 „ „ 43*92 7-572 



Diffusion of sulphate of soda in 9-875 days at 59°-9 : two cells, 



Grs. Ratio. 



From 1 per cent, solution 6*33 1*055 



» 2 „ „ 12-00 2- 



„ 4 „ „ 21-96 3-66 



„ 8 „ „ 41-38 6-896 



The following results of the diffusion of various salts from the 

 2 per cent, solution were obtained ; the times being always 8*083 

 days for the potash salts and 9*875 days for the soda salts — 



