JOHN H. NORTHROP 



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the total conductivity, as to render the measurement very uncertain. 

 It will be shown later, however, that in the case of gelatin the decrease 

 in conductivity can be followed and is proportional to the decrease 

 in the rate of digestion. 



TABLE I. 



Increase in Amino Nitrogen per Cc. of Solution Containing Normal Total Chlorine 

 Concentration Furnished by Different Salts. 



Original solution 0.5 n HCl. 



Made up to 1.0 n chloride concentration with salt noted. 



Table I contains a summary of the results of such an experiment 

 in which a series of egg albumin solutions all containing a total 

 chlorine ion concentration of 0.5 N and at a pH of 0.42 were brought 

 to a total chlorine ion concentration of 1.0 N by the addition of the 

 salts noted or excess acid. The final solutions therefore were all 



