PLATE 2 
The reaction of Mindum, Pentad, and F3 hybrids to biologic Form I. 
A. —^Mindum is immune, normally giving a few hypersensitive flecks. 
B. —Pentad is susceptible with types of infection varying from x— to 4. 
C. D.—^The F3 families shown are, respectively: 802-6, which appeared heterozy¬ 
gous; 809-5, which was immime like Mindum; 804-17, which showed greater suscep¬ 
tibility than Pentad. 
