The 



Journal of Heredity 



Vol. XIV, No. 3 June. 1923 



CONTENTS 



SAVING THE SIX-NIPPLED BREED 



Alexander Graham Bell !j!i 



HEREDITY AND TUBERCULOSIS (A Review) 112 



ARTIFICIAL VARIETIES UNDER NATURAL CONDI- 

 TIONS R. C. Benedict 115 



FURTHER POINTS ON THE RELATION OF CYTOLO- 

 GY AND GENETICS P. W. Whiting 110 



THE INHERITANCE OF DEFECTIVE SEEDS IN 



MAIZE P. C. Mengelsdore 1 19 



GENETICS IN RUSSIA 125 



HERITABLE CHARACTERS OF MAIZE— XIII ; SWEET 



DEFECTIVE AND FLINT DEFECTIVE 



E. W. Lindstrom 127 



INTERNAL SECRETIONS AND ACQUIRED CHARAC- 

 TERS (A Review) 130 



FOR THOSE ABOUT TO MARRY (A Review) 138 



THE ALLEGHENY COLLEGE BIRTH RATE.H. R. Hunt 13!) 



A HANDBOOK FOR TROPICAL PLANT BREEDERS 



(A Review) Ill 



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 post office 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, V/ashington, D. C. 



Date of Issue of this Number, June 30, 1923 



