421 



Fig. 3. Phases of negative and i^ositive charges of terms II— VI of the 



fatty acid series. 



Mt». 



1. Acetic acid, 2. Propionic acid, 3. Butyric acid, 4. Valerianic acid, 



5. Gaproic acid. 

 Division of abscissa and ordinate as in fig. 1. 



of salicylic acid of alkali-cations added in the form of neutral salts. 

 Here it was proved tliat the inhibitory influence of these cations on 

 the charge of salicylic acid was effected according to the lyotrope 

 series 



Li <Na, K <Rb <Cs <Am. 



We now wished to observe the action of the other cations. The 

 action of alkali-earths on the charge of salicjlic acid appeai-ed to 

 fall short of that of tfie alkalis. This could be established in two 

 concenti-ations of salicylic acid. 



Magnesium marks a transition to some extent, since in weaker 

 concentrations it impedes the charge more than Li, Na, K and Rb, 

 and is second only to caesium, while this inhibition in a highei' 

 concentration of the cation does not increase so rapidly as with 

 rubidium, and far less quickly than with the other alkali-metals, 

 so that the inhibitory effect of the latter often exceeds') (hat of 

 Magnesium. 



1) With 0.005 n. salt. 



