The Journal of 
PERE DITY, 
A monthly publication tlevoted to Plant reeding 
Animal Breeding and Eugenics 
ens 
Tue ImprovEMENT OF Root-Stocks. . . . H.J. WEBBER 
Crosses or Dairy AND BEEF CaTTLE . .~ . Joun W. GowWEN 
HERITABLE CHARACTERS OF MaizE . . ln J. H. Kempton 
Tue Immicration Proptem Topay. .  . Rosert De C. Warp 
Are VALENCIA ORANGES FROM CHINA? .. . ~—.-: LEE AND Scott 
INHERITED SYNDACTYLY IN Man pea Rate G, Horne 
RactAL Dirrerences In Mortratity 
ORGAN OF THE 
AMERICAN’ GENETIC:ASSOCIATION 
WASHINGTON - D.C. 
Printed for Civeulation among Members only 
Volume XI, Number 7 September-October, 1920 
