Th 



Journal of Heredity 



(Formerly the American Breeders' Magazine) 



Vol. VI, No. 2 



February, 1915 



CONTENTS 



War and Biology, by L. H. Bailey 51 



Reports for Sale at low Price 54 



Tmo Classes of Hybrids, by O. F. Cook 55 



A Race Betterment Exhibit 56 



Perjugate Cotton Hybrids, by Charles G. Marshall 57 



E. S. Carman, by E. M. East 65 



The Chromosome Hypothesis of Heredity, by John Belling 67 



Jersey-Angus Cattle, by Arthur H. Kuhlman 68 



Genealogy and Eugenics 72 



Tobacco Mutations, by H. K. Hayes 73 



New Publications: Einfiihrung in die experimen telle Vererbungslehre, 

 von Prof. Dr. Erwin Baur; The Fundamentals of Plant Breeding, 



by John IM. Coulter 78 



The Peopling of America, by Dr. Ales Hrdlicka 79 



Genetics and Government, by W. C. D. and C. D. Whethain 91 



Breeding for Energy, by Francis Galton 91 



The Early Marriage Question 92 



Breeding for Horns, by Frank N. Meyer 96 



Corriedale Sheep in the United States 96 



The Journal of Heredity is published monthly by the American Genetic 

 Association (formerly called the American Breeders' Association) for the benefit 

 of its members. Fifty per cent, of the annual membership fee is specifically desig- 

 nated as payment for the Journal. Canadian members who desire to receive it 

 should send 25 cents a year, in addition to their regular membership dues of $2, 

 because of additional postage on the magazine; foreign members pay 50 cents 

 extra for the same reason. Price of single copies, 25 cents. 



Entered as second-class matter August 27, 1912, at the postoffice at Washington. 

 D. C, under the act of August 24, 1912. Contents copyrighted 1914 by the 

 American Genetic Association. Reproduction of articles or parts of articles 

 permitted provided proper credit is given to author and to the Journal of Heredity 

 (Organ of the American Genetic Association), Washington, D. C. 



Date of issue of this number, January 25, 1915. 



