532 



BACTERIAL DISEASES OF PLANTS 



Fk;. -lOO.—Siuall hyperplasias developing in potato shoots in water-saturated 

 air in bright light at I'lothouse temperatures (28°-35°C.). The shoots are from 

 pared sterile potato flesh sealed into a test tube on wet cotton, March 28, 1919. 

 At XX, callous tissue. Photographed April 10. X 5. 



