[Vor. 8 
254 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Such a reversion of the reaction at the initiation of the fruiting 
stage will also be noted for Penicillium in the series at Pa 7.1. 
However, no such noticeable reversions of the reaction occurred 
Ratio 
80 
Pd 
Ya 
Pd 
Pd 
| / 
60 f- 
/ 
/ 
/ 
I 
/ 
4 
, TT 
/ so 
o / pL 
"pp 
— 
(0) 
4 8 12 16 
Days 
thiosulphate decomposed 
growth i 
9 
Fig. 4. Aspergillus niger, ratio 
----1--2--2-- initial Pg 4.2. 
(This legend holds for figs. 4—6.) 
with Aspergillus or Botrytis at any stage of growth on the solu- 
tions containing the thiosulphate. 
Two products of the decomposition of the thiosulphate are 
