The 



Journal of Heredity 



(Formerly the American Breeders' Magazine) 

 Vol. XII, No. 3 March, 1921 



CONTENTS 



POLLINATION OF PIMA COTTON IN RELATION TO THE YIELD OF 



SEED AND FIBER, by Thomas H. Kearney 99 



FOREIGN-BORN WHITE .FARM F?,fe "y irHNITED STATES 101 



COLOR INHERITANCE" the ti^jfi^%hyK. Kuiper 102 



CITY AND COUNTRY, ^y OfRCoOK 110 



HEREDITY AND SOCIAL FITNESS (REVIEW) 116 



FARMING RISKS GREATEST IN PLAINS STATES 116 



INHERITANCEOFSILKINESS IN FOWLS, by Sarah V.H.Jones 117 



REVERSION IN COMPOSITES, by J. L. Collins 129 



PROGRESS IN HORSE BREEDING, by W. S. Anderson 134 



HERITABLE CHARACTERS OF MAIZE— VII, by Lewis A. Eyster 138 



SOME PROBLEMS OF POPULATION IN JAPAN 141 



THE COLOR OF WHEAT KERNELS 142 



ANNUAL MEETING OF THE AMERICAN GENETIC ASSOCIATION. . . 144 



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 192 1 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 toauthorand to the Journal of Heredity (Organ of the American Genetic 

 Association, Washington, D. C), Menasha, Wisconsin. Address all communications 

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



Date of issue of this number, August 10, 1921. 



