102 



ION SERIES AND PROTEINS. I 



of brevity we will call this quotient the specific viscosity of the gelatin 

 solution. The curves for the four acids all rise steeply from the iso- 

 electric point with increasing hydrogen ion concentration until they 

 reach a maximum at pH about 3.0. The curves then drop again. 



3.0 

 2.9 

 2.8 

 2.7 

 2.6 

 2.5 

 2.4 

 2.3 

 2.2 

 2.1 

 2.0 

 1.9 

 1.8 

 1.7 

 1.6 

 1.5 

 1.4 

 1.3 

 1.2 

 l.l 



S-4 

 ■*—' 



o 

 o 



CO 



> 



CO 



o 

 o 



CO 



■> 



o 



d 



ex 

 J/9 



1.0 

 pn 1 2 3 4 5 6 



Fig. U. Curves of specific viscosity of gelatin succinate, tartrate, and citrate. 

 The curves are practically identical with those for the viscosity of gelatin chloride 

 and phosphate. 



The curves for the three acids, gelatin chloride, oxalate, and phos- 

 phate, are practically identical while the curve for gelatin sulfate is 

 considerably lower. 



