PLANT BACTERIA, VOL. 3. 



PLATE 39. 



Surface and interior of two tobacco stems inoculated at X September 23, 1905. with a pure culture of the Notth 

 Carolina tobacco organism (Bacterium solanicearum), and which did not succumb to the disease as promptly 

 as the plants shown in plates 33 and 36. 



Hard stems, green and sound externally, pith diseased (browned) and also some parts of the vascular system. The plant, septupled in size 

 alter the inoculation and the external signs of disease did not appear or were confined to the lower leaves. The leaf shown on plate 34 

 came from this series of inoculations. Photographed Feb. 39. 1006. Natural sire. 



