HYDROGEN ION CONCENTRATION AND PROTEOLYSIS. 173 



Graphic THePresentoti'oin (Z) 

 Table M . 



■MC/ieck) 



O Z^ 93 



/^V- 



ti'^a /-/oor^ 



Table XL and Graph 2 indicate the following Ph in the media: — 

 1. Alteration of Ph in the media occurred within the limit of Ph 4 to 

 10 in the course of growth; that is, 



Pii =4.82 changed to Pii =7.89 ' 

 Ph =5.42 changed to Ph =8.19 

 . Pii =6.42 changed to Ph =8.16 \ average Ph =8.076. 

 Ph =8.17 changed to Ph =8.13 

 Ph =9.43 changed to Pii =8.01 J 



