20 ART. 8. — S. KAWAMUEA : COAGULATION OF COLLOIDAL 



TABLE 12. 



111 the third cokimii are inchided electrolytes with mono- 

 valent anions. Of these the permanganate is the weakest and 

 its position is rather doubtful. Three are alkalies, which have 

 a pretty strong coagulative power, as first pointed out by Crum. 

 The remaining two are potassium cyanide and potassium silver- 

 cyanide. Why they act comparatively so strongly is not known. 

 Of the other twelve electrolytes belonging to this class, nine 

 have divalent anions, the remaining three being phosphoric acid 

 and its salts. Phosphoric acid, although it is tribasic, may not 



