Journal of Heredity 



Vol. XIW No. 9 December, 1923 



CONTENTS 



CAUSES OF DEFECTIVE CHILDREN .... M. G. Schlapp 387 



A NEW ^lETHOD OF GRAFTING. . .T. R.m.ph Robinson 39!) 



WENDELIAN ANALYSIS OF THE PURE BREEDS OF 



LIVESTOCK, II. The Duchess Shorthorns. Sewell Wright 405 



CORN AND CORN GROWING ( A Review ) 422 



THE ASIATIC BREEDS OF SHEEP, Considered from the 



Standpoint of Tail Formation C. C. Young 423 



ERRATA 432 



The JOURNAL OF HEREDITY is published monthly by the 



AMERICAN GENETIC ASSOCIATION 



At 1918-32 Harford Avenue, Baltimore, Md., and 

 Victor Building, 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 1924 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, January 31, 1924 



