420 



400 



380 



360 



340 



320 



300 



£ 280 



^ 260 

 C 



'^ 240 



.§ 220 



r3 200 



^ 180 



160 

 140 



1 



►J 120 



100 



80 



60 



40 



+20 



.20 



3Z 



Concentration 



Fig. 2. The same as in Fig. 1, except that abscissce in Fig. 2 are the concentra- 

 tions instead of the logarithms of concentrations as in Fig. 1. Within concentra- 

 tions of m/32 and 1 M the initial rise of liquid in 20 minutes is in direct proportion 

 to the concentration, as van't Hoff's law demands. 



176 



