398 



ION SERIES AND PROTEINS. Ill 



and that the cation has no augmenting effect is shown in Fig. 4, where 

 the influence of NaCl, CaClo, and LaCls upon the viscosity of gelatin 

 of pH 3.0 is represented. 50 cc. of a 2 per cent solution of gelatin 

 chloride of pH 3.0 were added to 50 cc.of a solution of different concen- 

 trations of each salt as described, the pH being kept at 3.0. It is 



2.7 



ae 



^5 

 2.4 

 23 

 22 

 21 

 20 

 1.9 

 L8 

 1.7 

 1.6 

 1.5 



8 



O 



o 



L4 

 13 

 12 

 LI 

 1.0 



" as 4096 2048 M S2 256 128 M 3Z 16 "S A T ^" 



Concentration 



Fig. 4. The depressing effect of equal molecular concentrations of NaCl, CaCl2, 

 and LaCla on the specific viscosity of 1 per cent gelatin chloride solution of pH 

 3.0 is in exact proportion to the concentration of the CI ions in the solution; i.e., 

 as 1:2:3. 



