266 



ION SERIES AND PROTEINS. II 



between the conductivities of gelatin oxalate and gelatin sulfate ; and 

 also a difference of only 20 per cent between gelatin sulfate and gela- 

 tin chloride at pH 3.7. As a matter of fact the difference in conduc- 



o 



X 



ZP 



1 



-a 

 c 

 o 

 u 



u 



pH 45 5 6 7 8 9 10 11 



Fig. 8. Conductivity curve for Na gelatinate. 



12 



tivity between gelatin oxalate and gelatin chloride which show equal 

 swelling, viscosity, and osmotic pressure is greater than the difference 

 in conductivity between gelatin chloride and gelatin sulfate which are 

 so enormously different in regard to swelling, osmotic pressure, etc. 



