Buffering Power of B. Coli 



427 



Our findings may be summarized in the following categorical 

 manner : 



1. In distilled water suspensions of Bacterium coli show a 

 marked tendency to resist a change in hydrogen-ion concentra- 

 tion in the zones of P H which are of physiological interest, t. e., 

 P H 4-10. In more acid and more alkaline solution this buffering 

 power is weaker and the buffer ratios approximate unity at P H 

 3-4 and at P„ 10-11. 



Type A 



Titration Cells 



an4 



Pt tkctroie 



tkttrtJt 



Tha cells used is conducting alectrcoatric titraticss of 

 bacterial susparaicca. 



