JACQUES LOEB 



395 



cosity of a solution of gelatin chloride of pH 4.0, the addition of Na 

 ion does not have such an effect, but the CI ion depresses the viscosity 

 in both cases, no matter whether NaCl or HCl is added to the gelatin 



2.8 

 2.7 

 2.6 

 25 

 2.4 

 23 

 2.2 

 2.1 

 2.0 

 1.9 

 L8 

 1.7 

 1.6 

 1.5 

 1.4 

 1.3 

 1.2 

 1.1 



o 

 u 



o 



.1—1 



.r— < 



o 



p. 



V5 



1.0 



n^N.N.N.N£LNNNN N 

 ^ 8192409620481021512 256 128 64 32 16 8 



Concentration 



Fig. 1. Difference in the effect of different concentrations of NaCl and of 

 HCl on the specific viscosity of a 1 per cent solution of gelatin chloride of pH 4.0. 

 In the case of NaCl we observe only the depressing effect of the CI ion; in the case 

 of HCl we notice an augmentmg effect of the H ion and a depressing effect of the 

 CI ion, the latter prevailing as soon as the concentration of acid added is > 

 N/256. 



