28 



ART. 8. — S. KAWAMURA : COAGULATION OF COLLOIDAL 



hydroxide was coagulated by saliva. This is doubtless due to 

 the protein present in it. We have tested the coagulativc power 

 of egg-albumin and obtained the following result. 



TABLE 16. 



Summary. 



1. The measurement of viscosity was found to be particularly 

 well fitted for the study of the coagulation phenomena of the 

 colloidal solution of aluminium hydroxide. 



2. The degree of coagulation was found to increase in 

 some cases suddenly and in others more gradually with the 

 increasing concentration of the electrolytes. 



3. Only anions were found to exercise coagulative power. 

 This is in accordance with the rule of Hardy, for the colloidal 

 solution shows anodic cataphoresis. 



4. The coagulative power of the anions increased rapidly 

 with the increasing valency, in confirmation of Schulze's rule. 



5. The final degree of coagulation caused by the increasing 

 concentration of various electrolytes differed considerably in dif- 

 ferent cases, and seemed to be characteristic of the action of 

 each electrolyte. 



6. Neither the concentration of the colloidal solution nor 



