JACQUES LOEB 



677 



380 



360 



340 



320 



tn 300 

 Ok) 



^ aeo 



^ 260 



C 240 

 9 

 ^ ezo 



S= zoo 

 a 



*_ 180 

 o 



^ 160 

 § 140 



g 120 



4— > 



S 100 



80 

 60 

 40 

 20 

 



JIHHIIIIIIIIIIIIII 1M9M 



1024 512 256 128 64 32 16 8 4 z ^^^ ^'^ 



Concentration o[ salt solution 



Fig. 3. The rate of diffusion of water through a negatively charged mem- 

 brane and the density of charge of the latter are depressed by monovalent, mon- 

 atomic cations in the order Li > Na > K. Solutions neutral (pH about 6.0). 



