PALMER, ATCHLEY, AND LOEB 



803 



creases with each increment of gelatin added but the curve is not a 

 straight line in any instance. The actual change in conductivity 

 as the concentration of gelatin increases from 0.8 per cent to 6.5 per 



30.9 



7,2 



&6 

 f.3 

 0.31 



H:3.3 



1 2 3 



PER CENT OF 



4 S 



6ELATIN 



Fig. 1. Conductivities of pure gelatin solutions. The abscissae represent 

 varying concentrations of gelatin in per cent and the ordinates represent specific 

 conductivities X 10~^. With increase in concentration of gelatin from 0.8 per 

 cent to 6.5 per cent it is seen that the conductivity of gelatin at pH 5.1 increases 

 from]^0.3 to 1.5, at pH 7.4 it increases from 1.3 to 7.2 and at pH 3.3 it increases 

 from 6.6 to 30.9. 



