625 



As we only have in view very dilute solulions, we may put 

 til = m- (namely = i]\\.f)). From this follows 



Pjb o)k 



(1 



C-^) 



or in words : ihe relation of the current potentials of two electrolyte 

 solutions ivhose concentrations are related as in the limit values of 

 colloids are inversely proportional to the specific resistances of those 

 solutions. 



Meanwhile attention should be called to the fact that by limit 

 values in this connexion we must not understand the concentration 

 y of the electrolyte added. From this a part is withdrawn by 

 adsorption and hence, to the setting in end-condition appertains a 

 lower concentration, which we will call ■/. In the experiments as 

 to the current potentials we may probably identify the total con- 

 centrations with the equilibrium concentrations as the adsorbing 

 surface (the glass walls) is so small: only in the case of the exceedingly 

 weak AICI3 solutions a doubt may arise. But in the colloid systems 

 that difference may not be neglected. These x-values thenjselves 



Fig. 1.1) 



1) In Fig. 1 on the axis ot coordinates slioukl be read — in stead of - 



