The Journal of 



HEREDITY 



^ montklij pmlicatm (kpotedtof/ad^reedim 

 Animal 3reedim and Emenics 



The Akala Berry of Hawaii J. F. Rock 



A New Tangelo Swingle and Robinson 



The Pejibaye, A Tropical Food-Plant Popenoe and Jiminez 



Milk Production of Young Cows J. J. Hooper 



City and Country O. F. Cook 



Visible Records OF Heredity. . . . David Fairchild 

 Datura — ^An Inviting Study of Heredity . . W. E. Safford 



PUBLISHED MONTHLY AT MENASHA, WISCONSIN 



BY THE 



AMERICAN GENETIC ASSOCIATION 



EDITORIAL AND GENERAL OFFICES 

 WASHINGTON, D. C. 



Volume XII, Number 4 April, 1921 



