264 



ELECTRIFICATION OF WATER 



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 to 



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• I — 1 



300 

 280 

 260 

 240 

 220 

 200 

 180 

 160 

 140 

 120 

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^ 80 



60 



40 

 20 



JlJ!LJMLJl.JlilJl ilH H HHil 

 8192 4096 2048 1024 512 256 128 64 32 16 8 4 Z 



Concentration 



Fig. 6. Positive osmosis when the same acids as in Fig. 5 are separated from 

 water by membranes not treated with gelatin. Curves similar to those obtained 

 with sodium salts of the same anion (Fig. l). 



bag separating the acid had been treated with gelatin, suggested that 

 the gelatin treatment had rendered the collodion bag more permeable 

 for acid. It was, therefore, expected that titration of the contents 

 of the bag at the beginning and after 20 minutes would show a greater 

 diminution of the concentration of acid inside the bag when the bag 

 had been treated with gelatin than when it had received no such 

 treatment. The test, however, disproved the correctness of this 

 explanation. The rate of diffusion of acid from solution into the dis- 

 tilled water was practically the same for collodion membranes treated 

 and not treated with gelatin, as Table I shows. 



