The 



Journal of Heredity 



(Formerly the American Breeders' Magazine) 



Vol. XII, No. 8 October, 1921 



CONTENTS 



TEOSINTE IN MEXICO G- N. Collins 339 



THE CELL MECHANISM (REVIEW) E. Eleanor Carothers 351 



THE IMPROVEMENT OF CITRUS FRUITS (REVIEW) 353 



THREE NEW MUTATIONS IN OENOTHERA LAMARCKIANA. 



George H. Shull 354 



KITH AND KIN Alexander Graham Bell 364 



FOUNDATIONS OF HUMAN GENETICS (REVIEW) 365 



INHERITANCE OF A PIT IN THE EAR J. E. Kindred 366 



THE TREND OF THE RACE (REVIEW) 367 



THE CONTROL OF PARENTHOOD (REVIEW) 367 



SELECTING HOLSTEIN-FRIESIAN SIRES FOR HIGH YEARLY 



PRODUCTION R- E- Hunt 368 



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, March 18, 1922. 



