236 



BACTERIAL DISEASES OF PLANTS 



1,-,,;. I7,s.— Original stock of B. curotovoru.s (Jones' 3«, received from him in 

 1920). Photographed after 3 days at 25° on + 14 l)cef-pepton agar, showing 

 surface and buried colonies. 7 is a buried colony beginning to come to the sur- 

 face, X is a young thin colony. Photographed, X 10 by oblique transmitted light 

 for comparison with Fig. 177. The colonies are smooth on the surface and show 

 internal wavy markings hv .,bli(iue transmitted light. KtiU infectious to carrot. 



