The 



Journal of Heredity 



(Formerly the American Breeders' Magazine) 



Vol. VIII, No. 3 March, 1917 



CONTENTS 



Chick with Four Legs and Four Wings, by M. A. Jul! Frontispiece 



The "Melting Pot" a Myth 99 



Progress of Plant Breeding in Italy 105 



The Treatment of Criminals 105 



Significant Evidence for Mental Heredity, by Frederick Adams 



Woods 106 



Race Hygiene in Germany, by G. von Hoffmann 112 



The Microscope in Zoology (Review of a book by Michael F. Guyer) 112 



Polar Bear Cacti, by O. F. Cook and Alice Carter Cook 113 



Economics and Eugenics (Review of a Book by Thomas Nixon 



Carver) 120 



Growth of Provision for the Feebleminded 120 



Eugenic Aspect of Sexual Immorality, by Roswell Hill Johnson. . . . 121 



The Texas Palmetto 123 



Adzuki Beans and Jimson Weeds, by A. F. Blakeslee and B. T. Avery 125 



More Schemes to Increase Population of Germany 131 



Study of Egg-Production in Poultry 131 



The Hen's Annual Vacation, by George M. Rommel 132 



A Valuable Collection of Reprints 142 



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-rnembers, $2.00 a year, foreign postage extra; 

 price of single copies. 25 cents. 



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

 ton, D. C, under the act of August 24, 1912. Contents copyrighted 1917 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 27. 1917. 



