488 



BACTERIAL DISEASES OF PLANTS 



Fig. 366.— Under-surface of a cauliflower leaf showing small tumors produced 

 by exposure for 3^ hour to vapors of heated Carnoy solution (acetic acid + 

 ethyl alcohol) in 10 cubic feet of air space (temperature 20°C.). Exposure 

 begun September 21, 1916. Photographed September 28, 1916. X 10. 



