THE PARASITISM OF BOTRYTIS CINEREA 425 
integrated, just as in a leaf with the fungus actually growing 
tiole. In a thin section placed in this substance the 
ls underwent the characteristic changes shown in fig. 7, 
ept that more plasmolysis took place. Apparently, there- 
fe, the toxic principle of this — is a soluble substance 
off ag the my celium. 
dby Ward. Potter (g) found ee the same effect 
ed by bacteria. The writer has found no marked change 
sed by boiling the extract. Certainly the softening of the 
and death of the cells resulted as before. It is evident, : 
, from the last result alone, that the effects of this aoe 
yn plant tissue are not entirely due to an enzyme. _ : 
study of the subject has led the writer to the conclusi 
different effects must be clearly distinguished, ol fol- 
the other: first, the death of the cells; and ‘ ‘th 
at necessarily always the same, each ecting” 
bstance. The latter conclusion has been ded 
