282 
Hours 
(Vou. 7 
ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Bactoria p ec. 
Logs. 
9.0 
um 
8.0 a 
7.0 \ 
| 
| 
6.0 
5.0 
4.0 
5.0 -A 
/ 
6.0 LL 
I 
7.0 / 
8.0 
9.0 
0 48 96 144 192 240 
Fig. 10. Growth and iiti ig ion concentration of Bacillus coli at 30° C. 
— — — plain bouillon J- HCl at intervals. 
———— : per cent dextrose bouillon. 
