JACQUES LOEB 



283 



This is illustrated by the experiments represented in Fig. 7. The 

 abscissae are the concentration of the salt added to the m/256 Na2S04 

 solutions. The electrolytes added were KOH, KCl, and MgCl2. 



280 



250 

 240 



220 



ojlJliLlLillLIlil H 



4000 2000 1000 500 250 125 62 31 15 



Concentration of salt added 



Fig. 7. m/256 Na2S04 solutions separated from water by a collodion membrane, 

 showing that the addition of salt or alkali to m/256 Na2S04 causes a similar 

 depression upon the initial rate of diffusion of water into the solution of m/256 

 Na2S04 as the addition of salt to a solution of Na gelatinate. Mg depresses more 

 than K. 



There was little difference in the effect of KOH and of KCl, while the 

 depressing effect of MgClo was considerably greater. // should be 

 stated that the collodion membranes used in these experiments had not 

 been treated with gelatin. 



