PLATE 3 
The reaction of Mindum, Pentad, and F3 hybrids to biologic Form XXXIV. 
A. —^Mindum, the susceptible parent, normally giving x+ and 4 tyijes of infection, 
principally the latter; Pentad, the resistant parent, with a range of infection types 
from o to x~. 
B, C.—^The F3 families shown are, respectively: 807-18, heterozygous; 805-16, as 
resistant as the resistant parent; 804-17, susceptible like Mindum. 
