PIRATE 15 
A. —Green Mountain diseased plant representative of many that showed greater 
dwarfing and curling of the middle leaves than of the lowest or upper leaves, apparently 
as a result of certain weather conditions (July 2, 1921). 
B. —(MTj) Tobacco plant inoculated 15 days previously and infected with juice 
from mosaic tobacco plant. (MPj) Tobacco plant of same seedling lot inoculated in 
same way with juice from mosaic potato plant 26 days previously, but not becoming 
infected. Orono greenhouse, March 2, 1920. From series 6 and 12, respectively, of 
Table XXI. 
C. —Lower leaves of Bliss Triumph plants in same mosaic tuber unit. Larger leaf 
grown in warm room, smaller one in cool place. Wrinkling and mottling were more 
pronounced in cool place. 
D. —Nightshade, Solarium, nigrum L. On left, inoculated and infected with juice 
from a mosaic potato plant. In center, inoculated and infected with aphids from a 
mosaic potato plant. On right, uninoculated healthy control from same lot. Note 
that the lower leaves from the main stem are similar for the three plants, but that 
infection dwarfed the upper parts. Orono greenhouse, April 20, 1920. 
