PLANT BACTERIA, VOL. 2. PLATE 2. 
Black Rot of Crucifers. 
Cabbage-leaf (plant 402), showing three marginal infections which began in groups of water-pores as the result of spraying Bacterium 
campestre upon the plant. The spraying was made Dec. 9, 1904, and the photograph at the end of two months (Feb. 6). 
