1920 
CHAMBERS—BACTERIAL INHIBITION BY METABOLIC PRODUCTS 257 
Bacteria per cc. 
(Logs. ) 
9.0 
ag Ie ne 
pos ~ 
8.0 Aa ESUN emama 
v N 
Ph 
4.0 
A POL Lema ET Se 
5.0 7 
6.0 
ps jt cu 
ee MM 
8.0 Ree i 
9.0 
Hours 0 48 96 144 192 
240 
Fig. 1. Growth and hydrogen ion concentration of Bacillus coli at 30° C. 
—— plain i 
— — — — 1 per cent dextrose bouillon. 
