1920] 
CHAMBERS—BACTERIAL INHIBITION BY METABOLIC PRODUCTS 279 
Bacteria per cc. 
ES. 
10.0 
— 1 
prt oe — a A 
P 
9.0 
Hours o 192 384 576 768 960 
Fig. 9. Growth and hydrogen ion concentration of Bacillus aerogenes at 30? C. 
— — — — 1 per cent dextrose bouillon. 
