528 



BACTERIAL DISEASES OF PLANTS 



FIG. 397. Portion of an Irish Cobbler potato sealed into a test tube on wet 

 cotton April 26, 1919. It shows numerous unruptured and ruptured intum- 

 escences, the latter bursting through the surface of the tuber (original strong cork 

 layer). Flesh more acid than normal potato flesh, i.e., + 35 on Fuller's Scale. 

 Photographed May 14, 1919. X 4 circa. 



