The 



Journal of Heredity 



(Formerly the American Breeders' Magazine) 

 Vol. XII, No. 4 April, 1921 



CONTENTS 



THE AKALA BERRY OF HAWAII, byj. F.Rock 147 



RACE AND NATIVITY OF FARMERS IN THE UNITED STATES LSO 



ANEWTANGELO.byW.T. Swingle and T. R.Robinson 151 



AMEBOID MOVEMENT (REVIEW) 153 



THE PEJIBAYE, A NEGLECTED FOOD-PLANT OF TROPICAL AMER- 

 ICA, by Wilson Popenoe and Oton Jiminez 155 



MILK PRODUCTION OF YOUNG COWS, by J. J. Hooper 166 



CITY AND COUNTRY, by O. F. Cook 167 



VISIBLE RECORDS OF HEREDITY, by David Fairchild 174 



THE "PROTECTIVE COLORATION" THEORY, by T. Barbour 177 



DATURA— AN INVITING GENUS FOR THE STUDY OF HEREDITY, 



by W. E. Safford 178 



EDUCATION AND THE SIZE OF FAMILIES, by A. W. Forbes 190 



A RABBIT WITH FIVE LEGS AND SIX FEET, by F. E. Chidester 192 



THE DAWN OF EUGENICS 192 



The Journal of Heredity is published monthly by the 



AMERICAN GENETIC ASSOCIATION 



Publication office, 450 Ahnaip Street, Menasha, Wis. 



Editorial and general offices. Washington, D. C. 



The Journal of Heredity is published by the American Genetic Associa- 

 tion for the benefit of its members. Canadian members who desire to receive 

 it should send 25 cents a year, in addition to their regular membership dues of $3.00, 

 because of additional postage on the magazine; foreign members pay 50 cents extra 

 for the same reason. Subscription price to non-members, $3.00 a year, foreign post- 

 age extra; price of single copies, 35 cents. 



Entered as second-class matter May 13, 1921, at the postoffice at Menasha, 

 Wisconsin. Acceptance for mailing at the special rate of postage provided for in 

 Section 1103, Act of October 3. 1917, authorized Dec. 20, 1918. Contents copy- 

 righted 1921 by the American Genetic Association. Reproduction of articles or parts 

 of articles permitted only upon request, for a proper purpose, and provided due credit 

 Is given to author and to the JOURNAL OF HEREDITY (Organ of the American 

 Genetic Association, Washington, D. C), Menasha, Wisconsin. Address all com- 

 munications to the Association's office at Washington, D. C. 



Date of issue of this number, August 30, 1921. 



