PROCEEDINGS OF THE AMERICAN ACADEMY. 



Dialysis of the Violet Solution. 



Thus the " dialyte," or the portion which passed through the dia- 

 phragm, seemed to be slightly more basic than that which remained 

 behind — but the difference is scarcely greater than the possible errors 

 of analysis. The diffusion is obviously concerned chiefly with the nor- 

 mal salt, Cr 2 (S0 4 ) 3 . 



Very different results were obtained when the green solution was sub- 

 jected to dialysis. Below are given the corresponding analyses of 

 material which had been hydrolyzed by heating to the boiling point : — 



Dialysis of the Green Solution. 



