The 



Journal of Heredity 



Vol. XIV, No. 1 April. 1923 



CONTENTS 



DUCTLESS GLANDS AND DEVELOPMENT— II 



JULL\N HUXLEV 3 



RASPBERRY BREEDING NOTES Paul Thayer 13 



THE HUMAN MACHINE (A Review) 13 



HEREDITARY SHORTNESS OF THUMBS 



J. K. Breitenbecher 15 



SOCIAL AND BIOLOGICAL HEREDITY (A Review).... 22 



COLOR INHERITANCE IN FOWLS L. C. Dunn 23 



PARENTHOOD AND RACE CULTURE. .Percy W. Toombs 33 



EMBRYOLOGY AND HEREDITY (A Review) 38 



UNUSUAL COLOR INHERITANCE. .George S. Templeton 39 



BOOKS RECEIVED 40 



A NEW METHOD OF SELF-POLLINATING CORN 



jMerle T. Jenkins 41 



MUTATIONS OF THE POTATO Donald Folsom 45 



The JOURNAL OF HEREDITY is published monthly by the 



AMERICAN GENETIC ASSOCIATION 



At 1918-32 Harford Avenue, Baltimore, Md., and Washington, D. C. 



Address communications regarding editorial matters and the business management of the 

 Association to Box 354, Penna. Ave. Sta., Washington, D. C. 



Entered as second class matter February 24, 1923, at the postoffice at Balti- 

 more, Maryland. Acceptance for mailing at the special rate of postage 

 provided for in Section 1103, Act of October 3, 1917, authorized December 20, 

 1918. Contents copyrighted 1923 by the American Genetic Association. Re- 

 production 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, Washington, D. C. 



Date of Issue of This Number, May 18, 1923 



