920] 
CHAMBERS—BACTERIAL INHIBITION BY METABOLIC PRODUCTS 271 
Bacteria per cc. 
(Logs.) 
MU E E ix 
Ph 4.0 
Hours 0 48 96 144 192 240 
Fig. 6. Growth and hydrogen ion concentration of Bacillus coli at 30? C., dex- 
trose added at intervals. 
