PLATE 57 



Plum leaves from inoculation series 103 (Table VI): 



A. — P. domestica. 

 B. — P. insiiitia. 



C. — P. domestica, uninoculated. 

 D. — P. americana. 

 E. — P' salicina. 



Tfeese leaves were inoculated comparatively with a strain of Coccomyces from P. 

 domestica. 



