[Vor. 8 
268 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
sulphate cultures, however with a slightly different Py, it can be 
seen that the growth of Aspergillus is less, that of Botrytis about 
the same, and that of Penicillium practically double. Both 
Aspergillus and Penicillium exhibit a reversion of the reaction, 
Ory wt. Ge: 
coms P Lodine 
0 
- 
- 
100 - d 2 
L 
80 — j 6 
d / 
"A 
60 f 7 10 
[iT 
mH 
40 a - E 14 
| yk 
20 il Lf —— 18 
/ / CT 
8 12 16 
Days 
Fig. 13. Aspergillus niger on solution of initial Pg 7.1 containing 
thiosulphate. 
