The 



Journal of Heredity 



(Formerly the American Breeders' Magazine) 



Vol. VIII, No. 12 December, 1917 



CONTENTS 



Arboreal Man 531 



Maine Station Collects Breeding Records 542 



Eugenics in Jewish Life, by Maurice Fisliberg 543 



Multiple Button-Balls, by R. W. Shufeldt 550 



Babies not Banished from Washington Apartment Houses 552 



American Sycamores are Possibly Hybrids, by Augustine Henry. . . . 553 



Socio-Anthropometry (Review of a Book by B. L. Stevenson) 553 



Intelligence of Immigrants 554 



No Meeting of the Association to be Held this Year 556 



An Avocado Monstrosity, by Robert W. Hodgson 557 



A Bottle-Necked Lemon, by Leonhardt Swingle. 559 



The Number of Unmarried Persons in the United States 560 



Pure-lines of Bacteria 560 



Color Inheritance in Mammals; VII, The Horse, by Sewall Wright. . 561 



The Occurrence of Seven-Leaved Clover Leaves 564 



The Duchess Apple Improved, by M.J. Dorsey 565 



Low Fecundity of Intellectual Negroes 567 



A Golden Variety of Rye, by Juan WiUiamson 568 



A Plant w ith LTnderground Spines 569 



What Determines Longevity? 569 



Index for Volume VIII, 1917 .571 



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 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, November 26, 1917. 



