124 



Journal of Agricultural Research 



Vol. XV, No. 3 



added, it combines with these hydrolytic protein products in larger and 

 larger amounts as the hydrogen-ion concentration is reduced below 

 Ph8.3 and more so when it approaches 9.3. If the titrations had been 



^ 



Vi 



Fig. 4.— Graphs showing quantity, in cubic centimeters, of alkali used in water extract of silage; com- 

 parison of colorimetric titrations with phenolphthalcin, and electrometric titrations to PhS.j. 





n><\ trt ID u 13 IT 31 



D(U(5 



Fig. s.— Graphs showing quantity, in cubic centimeters, of alkali used in alcoholic extract of silage; com- 

 parison of colorimetric titrations, with phenolphthalcin, and electrometric titrations to Ph9-3- 



carried to a concentration of PhIO or lower, the differences obtained 

 might have been even greater. Some work done in our laboratory on 

 the hydrolysis ot wheat substantiates this supposition. 



