PLATE s 
A. —Two hills of com of same age, photographed 44 days after planting. The hill 
on the left contains two plants from diseased seed, the hill on the right three plants 
from disease-free seed. 
B. —Same hills as in A, photographed 120 days after planting. The hill on the left 
produced 380 gm. and the hill on tne right 930 gm. of air-dry shelled com. 
