JOHN H. NORTHROP 



733 



IV. Influence of the Hydroxyl Ion Concentration. 



It has been shown above that the velocity of hydrolysis of gelatin 

 is directly proportional to the hydrogen ion concentration as measured 



TABLE VII. 

 Hydrolysis oj 2.5 Per Cent Gelatin in Strong Alkali at 40° C. 



by the hydrogen electrode in acid concentrations of from 0.10 to 

 4.1 N, In Table VII the results of a series of determinations in strong 

 alkali are given. The concentration of hydroxyl ions was calculated 



