E. R. Saunders 



375 



TABLE V. 



Showing the number oj singles and doitbles obtained in F^ families derived from mtUings 

 of the form d^ y. no-d S • In this case some of the families toill contain doubles and 

 some tvill be aU- single. [The all-single families in each mating are arranged on the 

 left, the mixed families on the right.^ 



