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Journal of Heredity 



(Formerly the American Breeders' Magazine) 



Vol. IX, No. 3 March, 1918 



CONTENTS 



Avocados as Food in Guatemala, by Wilson Popenoe 99 



The Nassau Survey 108 



Infant Welfare Work in War Time Ill 



Gardens for Plant Breeders, by David Fairehild 112 



Earliest Man 117 



Additional Facilities for Army Medical Museum Necdtd 121 



War Makes Large Demands upon Horse Breeders 124 



Decadence of Horse Breeding, by Henry M. Jones 125 



Inheritance of Diathesis through Five Generations 130 



A New Scientific Journal 131 



Families of Six Generations 132 



The Effect of Recessive Factors 131. 



A New Forage Plant, by F. B. Linficld 135 



Factors Affecting Egg Production 138 



New Paper-making Materials 138 



Color Inheritance in Mammals; X, The Cat, by Sewall Wright 139 



French Stocks in Canada 144 



The Journal of Heredity is published monthly by the American Genetic 

 Association (formerly called the American Breeders' Association) 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 $"2, because of additional 

 postage on the magazine; foreign members pay 50 cents extra for the same 

 reason. Subscription price to non-members, $2.00 a year, foreign postage extra; 

 price of single copies. 25 cents. 



Entered as second-class matter February 24, 1915, at the postoffice at Washing- 

 ton, D. C, under the act of August 24, 1912. Contents copyrighted 1918 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, February 26, 1918. 



