JACQUES LOEB 



179 



HH^inillinriririiri nri 



8192409620481024 512 256 128 64 32 16 8" 4 E 



Concentration 



Fig. 4. Explanation of the curves in Fig. 3 given for the Na2S04 curve. The 

 first rise and fall between m/8,192 and m/16 represent the electrostatic action of 

 ions of the solute upon the rate of diffusion of positively charged water particles. 

 The second rise beyond m/16 represents the rise due to the gas pressure effect of 

 the solute. The steep rise of the curve between and m/256 is due to the preval- 

 ence of the attractive action of anion upon the positively charged molecules of 

 water, while the drop beyond m/256 is due to the fact that the repelling action of 

 cation upon the positively charged particles of water increases more rapidly with 

 increasing concentration than the attractive action of SO 4 for the water. 



