No. 3, December, 1920] GENETICS 159 



A defense of author's well-known theory of evolution by means of hybridization against some 

 of the opponents: Dbndy, Jeffrey, and an exposil ion of arguments brought together by other 

 writers (IIicimhiort-Nilsson, Winge, Ernst, Gerould, and others) thai support the author's 

 views. — M . J. Sirks. 



1107. MacBride, E. W. The method of evolution. Scientia 14: 2&-33. 1920. 



110S. 0'D[onoghue], C. II. [Rev. of: Morgan, Thomas Hunt. The physical basis of 

 heredity. 14 X 21 cm., 300 p., 117 fig. J. B. Lippincott Co.: Philadelphia, 1919. (See Bot. 

 Absts. 5, Entry 422.)] Science Progress 15: 150-151. July, 1920. 



1109. 0'D[onoghue], C. H. [Rev. of: East, Edward M., and Donald F. Jones. In- 

 breeding and outbreeding. 14 X 11 cm., 285 p., 46 fig. J. B. Lippincott: Philadelphia, 1919. 

 (See Bot. Absts. 4, Entry 571; 5, Entries 437, 1607, 1095.)] Science Progress 15: 151-152 

 July, 1920. 



1110. ; D[onoghue], C. H. [Rev. of: Lillie, Frank Rattray. Problems of fertili- 

 zation. 13 X 19 cm., vii 4- 278 p., 19 fig. Univ. Chicago Press: Chicago, 1919. (See Bot. 

 Absts. 5, Entry 410.)] Science Progress 15: 152. July, 1920. 



1111. Pezard, A. Castration alimentaire chez les coqs soumis au regime came exclusif. 

 [Alimentary castration in cocks subjected to an exclusive meat diet.] Compt. Rend. Acad. 

 Sci. Paris 169: 1177-1179. 1919.— A discussion of certain experiments of F. Houssay in a 

 paper entitled "Variations experimentales. Etudes sur six generations de poules carnivores 

 (Arch, de Zool. exp. et gen., t. 6, 1907, p. 137 a 332." Author concludes that Houssay's 

 observation of atrophied testes and their consequences did not result directly from the flesh 

 diet, but because the birds did not maintain good health. — //. D. Goodale. 



1112. Renner, O. [German rev. of: Ernst, A. Bastardierung als Ursache der Apogamie 

 im Pflanzenreich ; eine Hypothese zur experimentellen Vererbungs- und Abstammungslehre. 

 (Hybridization as the cause of apogamy in the plant kingdom; an hypothesis for experimental 

 evolution and genetics.) 8vo, xv + 655 p., 2 pi., 172 fig. Gustav Fischer: Jena, 1918. (See 

 also Bot. Absts. 3, Entries 2113, 2151.)] Biol. Zentralbl. 40: 288. June, 1920. 



1113. Richey, H. W. Factors of fruitfulness. [Rev. of: Wiggans, C. C. Some factors 

 favoring or opposing fruitfulness in apples. Missouri Agric. Exp. Sta. Res. Bull. 32: 1-60. 

 6 fig. 1918. (See Bot. Absts. 5, Entry 1696.)] Bot. Gaz. 70: 162-164. Aug., 1920. 



1114. Roemer, Th. Uber Lupinenziichtung. [On lupine breeding.] Deutsch. Landw. 

 Presse 1919: 174-175. 1919. — Breeding can secure in lupines a condition of uniform ripening 

 which in these plants is dependent on uniform germination and uniform blooming. In both 

 of these respects individual selection has shown differences. Seed harvest can be increased 

 also by use of best plants revealed by individual selection. Average fruitfulness of pods is 

 hereditary. [From anonymous review in Zeitschr. Pflanzenzucht. 7: 136. Dec, 1919.] — 

 J. P. Kelly. 



1115. Roepke, W. Over selectie van meerderjarige cultuurgewassen in tropisch Neder- 

 land. [On selection of perennial cultivated plants in the Dutch tropics.] Rede Landbouw- 

 hoogeschool. 24 p. H. Veenman: Wageningen, 1920. — As an inaugural address at the Agri- 

 cultural College of Wageningen the author gives a summarizing report of the work done in 

 the Dutch East Indian colonies in selecting and breeding better races of rubber, tea, coffee, 

 cocoa and quina; he discusses the most important parts of his breeding, and amelioration of 

 the existing material; the vegetative propagation of worthy types on a small scale and on a 

 large scale, hybridization and introduction of new species. Each of these methods has given 

 to the Dutch East Indies valuable types of cultivated plants. — M. J. Sirks. 



BOTANICAL ABSTRACTS, VOL. VI, NO. 3 



