24 ART. 8. S. KAWAMUFvA : COAGULATION OF COLLOIDAL 



-4 .22 .40 .70 .8.') -3 .22 .10 .70 -2 



.70 -I 



fullest cofirmatiou in all details. As to the quantitative relation 

 proposed by Hardy and Whetham/ it may be tested in the 

 following manner. The concentration necessary for complete 

 coa2;ulation is : 



Pt (CK), K, 

 0.1 



Fe (CN),; K, 

 0.0015 



Fe(CN)oK4 

 0.0005 



If n be the valency of the anion, then the ni\i root of the 

 concentration oua;ht to have one and the same value. 



rt(CN)jc 



0.3 



Fe(ÜN)„K3 

 0.11 



Fe(CN)oK, 

 0.15 



The order of the numbers is the same, but the difference is too 

 great to be ascribed to experimental error. 



1. Journal o£ I'hysiology, ~i, (ISD'J), öOl. 



