The 
Journal of Heredity 
(Formerly the American Breeders’ Magazine) 
Vou: Nor 7 SEPTEMBER-OCTOBER, 1920 
CONTENTS 
The Improvement of Root-Stocks Used in Fruit Propagation, by H. J. Webber. 291 
Inheritance in Crosses of Dairy and Beef Breeds of Cattle, by John W. Gowen 300 
Our Most Significant Crops—Our Boys and Girls........................ 316 
Heritable Characters of Maize, by J. H. Kempton........................ 317 
The Immigration Problem Today, by Robert De C. Ward................. 323 
Are Valencia Oranges from China? by H. Atherton LeeandL.B.Scott....... 329 
SUING FATMN OSES RCC VAC Wy) muewer ese) Nae ee tenets onc Aeron ice ola rons coe eietere Stason Cuesns ede med 333 
A Case of Inherited Syndactyly in Man, by Ralph G. Hurlin....... 334 
Rea cia Ub rerencesian gVLOLea le pve etsclercysrorar net heeedh chee wie aoinys ove sl aictarvern Stach ote 336 
The JourRNAL or HEREpITyY is published monthly by the American Genetic Society. 
Publication office, 450 Ahnaip Street, Menasha, Wis. 
Editorial and genera! offices, Washington, D. C. 
The JourNAL or HeReEpITYy 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, 25 cents. 
Application has been made for entry as second-class matter at the postoffice at 
Menasha, Wisconsin. Contents copyrighted 1921 by the American Genetic As- 
sociation. 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 Herepity (Organ of the American Genetic Association), Washington, D. C. 
Date of issue of this number, March 23, 1921 
