[Vor. 8 
252 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
stand for 24 hours so that a state of equilibrium would be attained. 
By this procedure the final volume of the solution was 50 cc., and 
the concentration of the salts was comparable to that of the 
original solution. 
The successive increases in growth, decreases in the amount of 
Dr y wt. P Ee 
c, "ER H lodine 
80 \ 3 4 
» did : f 
A / 
60 |= 4 8 
— 
40 k 12 
Lt 
ri 
¥ 
/ 
| 6 
20 F 16 
eee Tt 
a" rome 
Pd ad 
A 
Olam 7 20 
0 4 8 12 16 
Days 
Fig. 3. Botrytis cinerea on solution of initial Px 4.2 containing 
thiosulphate. 
thiosulphate present, and changes in the reaction were deter- 
mined for each series of cultures. 
