Txi 



Journal of Heredity 



Vol. XIV. No. .S November, 1923 



CONTENTS 



MKNDELIAN ANALYSIS OF THE PURE BREEDS OF LIVE- 

 STOCK. I Practical Breeding Methods in Terms of Modern Genetics 

 Sewall Wright 339 



MENDEL "COMES BACK" 348 



HERITABLE CHARACTERS OF MAIZE. XVI— Dead Leaf Margins 



J. H. Kempton 349 



A UNIVERSAL CARD SYSTEM OF FAMILY PEDIGREES 



Howard J. Banker 353 



A VIEW OF BIRTH CONTROL (A Review) 358 



DEFECTIVE SEEDS IN MAIZE— AN ANCIENT CHARACTER 



Frederick D. Richey 359 



COMPLETE SEX-TRANSFORMATION IN THE DOMESTIC 



FOWL F. A. E. Crew 361 



THE RACIAL PROSPECT IN SOUTH AFRICA 363 



EARLY CIVILIZATION (A Review) 364 



THE STATUS OF EVOLUTION (A Review) 365 



THE BONES OF ANCIENT PERUVIANS (A Review) 367 



THE DISEASES OF CHILDREN (A Review) 368 



ORIGIN OF MONGOLIAN IDIOCY 368 



THE TORTOISESHELL CAT F. A. Haves 369 



CAUSES OF TWINNING (A Review) 370 



ADDITIONAL MUTANT CHARACTERS IN DROSOPHILA WIL- 



LISTONI. .Ruth M. Ferry, Rebecca Lancefield, Charles W. Metz 373 



RACIAL ORIGIN OF GREGOR MENDEL 384 



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, Washington, D. C. 



Date of Issue of This Number, December 17, 1923. 



