Bui. 1090, U. S. Dept. of Agriculture. 



Plate II. 



Fig. 1. — Male of Family 13, Belonging to the Eighteenth Generation 



OF Inbreeding. 



Fig. 2. — Female of Family 13, Full Sister of the Male Shown Above. 



The heaviest animals and the largest litters come in thi^ family. It Ls above the average in 

 most other respects but is next to the poorest in resiitaace to tuberculosis. The large 

 amount of white is characteristic. 



I 



