PLATE 26. 



Effect of Bacterium solanacearum on a tomato-plant. 



The left-hand plant was inoculated in the stem on July 5, by means of a few needle -pric Its. The right-hand plant was pricked with a sterile needle. 

 The infectious material was a subculture from a poured-plate colony. This was obtained from the interior of a potato-stem, naturally infected, in 

 District of Columbia. Photographed July 1 1 . 1904. About one-third natural size. 



