IMPROVING EGG PRODUCTION BY BREEDING. 23 1 



X 



JF 



^7^am^^^*i\ j-'S 



^ C 



*3 



+ 4 ^KT +A 



+1 



+ 1 



16 '+12 



-•^^ 



r 



= 14 ^m + 2 



+ 6 



^■8 +2 



Fig. 75. Diagrams showing the resuUs of mating : D, a Type 4 male ; 

 E, a Type 5 mak, and F, a Type 6 male, with high laying hens. 



