PLATE 61 
First case of wilt in the top of a large blossoming Ricinus plant. This was inoculated 
by needle pricks at X X , on the stem and petiole, June 28, with a culture isolated from 
tomato No. 1. Bacteria had penetrated into all the main ribs of the blade of the 
wilted leaf. The brown stain and bacterial occupation of the bundles of the petiole 
were also very conspicuous. Photographed July 13, 1918. 
