New York Agricultural Experiment Station. 



471 



tap-water was used. In order to secure absolutely parallel con- 

 ditions, except as to the liquid in which the spores were germin- 

 ated, the treated cells and check were, in every case, taken from 

 the same spore-pustule, or sorns, as it is technically called. 

 The results are presented in the following tables: 



Copper Sulphate. 



