BACTEEIAL CANKER OF TOMATO! TRANSMISSION 217 



Fig. 160. — Aplanobacter michiganense: uniformly sown on +15 peptone-beef 

 agar-poured plate, showing growth of colonies inhibited everywhere except in 

 the vicinity of the central white intruding colony which is an alkah-producing 

 schizomycete. At x there is an inhibiting mold colony, probably an acid producer. 

 There was a brown stain in the agar between and around the yellow colonies. 

 The colonies on the inner part of the periphery were fluorescent. Those on the 

 outer one-fourth were not fluorescent. Photographed December 13, 1915. 

 Slightly enlarged. 



