440 

 420 

 400 

 380 

 360 

 340 

 jL. 320 



CO 



■g 300 



> 



4_ 280 



o 



,C 260 

 § 240 



!^ 220 



X) 



. 200 



O 



o) 180 



S 160 



§ 140 



S 120 



100 



80 



60 



40 



20 







_I^Jl__£Lli Jl HH H N H N H H iM 

 8192 4035 2048 1024 512 256 128 64 3Z 16 8 4 2 



Concentration 



Fig. 1. Curves representing influence of concentration of solutions of different 

 Na salts upon the initial rate of diffusion of water from pure water into solution 

 through membranes not treated with gelatin. The curves are essentially the 

 same as those obtained with collodion membranes which had been treated with 

 gelatin.' Abscissae are the logarithms of concentration, ordinates the rise of height 

 of level of solution in 20 minutes. Inside of collodion bag salt solution, outside 

 H2O. 



« Loeb, J., /. Gen. Physiol., 1919-20, ii, 177, Fig. 3. 



257 



