[Vor. 7 
274 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Bacteria per cc. 
(Logs.) 
9.0 LO ni —, 
F A A a 
AP EA — — A 
D^ —— ml E 
P ii: 
o 
8.0 | 
7.0 
5.0 
Py 
4.0 
5.0 =— 
EU Deae CONMN 
^ ~ 
6.0 É^ » — 
4 x 
NN x 
L] 
7.9 S > o 
c» "d 
8.0 
ji OU a MEE 
9.0 
Hours 0 48 96 144 192 ` 240 
Fig. 7. Growth and hydrogen ion concentration of Bacillus coli at 30? C., varia- 
tion in initial dextrose. 
.1 per cent dextrose. 
-------- .2 per cent dextrose. 
— — — — .3 per cent dextrose. 
