488 



BACTERIAL DISEASES OF PLANTS 



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

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

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

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



