April, 1920] GENKTICS 145 



995. Fairchild, David. Some present aspects of immigration. Jour. Heredity 10: 

 68-70. 1919. — A brief abstract of the Fourth Report of the Committee on Immigration of the 

 American Genetic Association. Emphasis is placed upon the advisability of a more rigid 

 rejection of those immigrants found to be mentally defective or diseased. Certain features 

 of the new immigration law are pointed out which show that it is qualitatively selective rather 

 than numerically restrictive. — M. J. Dorsey. 



996. Freud, Sigmund. Three contributions to the theory of sex. 3d rev. ed., 117 p. 

 Nerv. and Ment. Dis. Publ. Co.: Washington, D. C. 1918. — Book is mostly psychoanalysis 

 of abnormal sexual phenomena in man with special reference to infancy and puberty. Brief 

 references to source of aberrations attribute them chiefly to experiences, in some cases in 

 lesser degree to heredity. — A. Franklin Shull. 



997. Gager, C. Stuart. [Rev. of: Macfarlane, John Muirhead. The causes and 

 course of organic evolution. A study in bioenergetics. 875 p. The Macmillan Co. : New York, 

 1918.] Torreya 19: 93-101. 1919. 



998. Goodspeed, T. H., and Pirie Davidson. Controlled pollination in Nicotiana. 

 Univ. California Publ. Bot. 5:429-434. 1918. — In controlled pollination relative number 

 of pollen grains to number of seeds produced through fertilization determined on six plants 

 of Nicotiana Langsdorffii var. grandiflora. Few ovule fertilizations are sufficient to' cause 

 non-abscission of flowers. — R. J. Garber. 



999. Gowen, J. W, Inheritance studies of color and horn characteristics. Maine Agric. 

 Exp. Sta. Bull. 272:127-148. 4 fig- 1918.— Author presents preliminary report of cattle 

 crosses involving Jersey, Guernsey, Ayrshire, Holstein-Friesian, and Aberdeen-Angus. 

 Black is dominant to red and yellow (fawn). Appearance of a deep orange-coated animal 

 from mating of first cross Aberdeen-Angus-Guernsey bull to Guernsey cow indicates that 

 Guernsey breed carries recessive dilution factor. Pigmented muzzle is dominant to unpig- 

 mented, pigmented tongue is dominant to non-pigmented, and black switch seems to cause 

 suppression of other switch colors. White markings of inguinal region seem to be dominant, 

 while those of face, neck shoulders, rump, flanks, and legs are probably recessive to coat 

 wholly colored. That the polled condition is a simple dominant is questioned. Author sug- 

 gests that male sex organs have some action on presence or absence of horns. In cross of 

 beef and dairy types the Fi showed beef type most in head and shoulder, while dairy type 

 showed most in barrel and hindquarters. Study of milk and fat production indicates, accord- 

 ing to the author, independent transmission in which high milk production is dominant to 

 low and low percentage of fat dominant to high. Data are too few for definite conclusions. — 

 Elmer Roberts. 



1000. Grant, Madison. Discussion of the article on democracy and heredity. Jour. 

 Heredity 10: 164-165. 1919. — [A further discussion of Ireland's article, Jour. Heredity 9: 

 339-342. 1918. (See Bot. Absts. 3, Entry 261.)] emphasizing the value of heredity versus 

 environment as a factor in determining social worth in individuals. [See Bot. Absts. 3, 

 Entries 984, 1002.] — Af. J. Dorsey. 



1001. Hall, Prescott F. Immigration restriction and world eugenics. Jour. Heredity 

 10: 125-127. Mar., 1919. — A discussion of the direct and indirect results of the immigration 

 of foreign peoples of low standard into a country of high standard in relation to world 

 eugenics. Such immigration does nothing but harm to the country receiving it, both biologi- 

 cally and physiologically, and by confinement and limitation in the country from which it 

 comes would prevent the dilution of better stocks. Thus, by encouraging the fit and limit- 

 ing or preventing the multiplication of the unfit the result is not merely a selfish benefit to 

 the higher races but a good to the world as a whole. — M. J . Dorsey. 



BOTANICAL ABSTRACTS, VOL. in, NO. 4 



