No. 4, January, 1921] GENETICS 237 



1630. Bauer, J. Aufgaben und Methoden der Konstitutionsforschung. [Problems and 

 methods of study of the constitution.] Wiener klin. Wochenschr. 32:273-276. 191ft. — Re- 

 search on variations in the constitution h:is its its ultimate aim an explanation of inter- and 

 intra-racial differences in anatomical and functional conditions, with special reference to the 

 influence of these conditions on the incidence and course of disease. The various types of 

 habitus that have been proposed are of great importance, but need careful analysis and 

 revision. A thorough study of the nature of factors determining a given habitus is especially 

 needed. In the study of organs and organ systems care must be exercised in determining 

 whether any particular characteristic owes its existence to a peculiarity inherent in the 

 organ itself, is "autochthonous," or to influences brought about through intermediation of the 

 neuro-glandular system. With reference to the incidence of disease we must determine to 

 what extent constitutional predispositions are taxable for the incidence of different diseases, 

 and whether or not there are some diseases whose occurrence is wholly dependent on more or 

 less specific constitutional deficiency. It is also highly important to be able to recognize 

 anatomical or functional constitutional weakness before it has already been exposed by dis- 

 ease. The author makes a plea for a clinico-hereditary study of every possible case, since 

 only in that way may be obtained knowledge of the greatest value to practical medicine, pub- 

 lic health, and eugenics. — C. H. Danforth. 



1631. B(ean), W. J. One-leaved ash (Fraxinus excelsior heterophylla.) Kew Bull. Misc. 

 Inf. [London] 1919: 390-391. 1919.— Seeds from this form gave part of the seedlings of the 

 same type. — E. Mead Wilcox. 



1632. Becker, J. Serologische Untersuchungen auf dem Gebiete von Pflanzenbau und 

 Pflanzenzucht. [Serological investigations in the realms of plant production and plant breed- 

 ing.] Landwirtsch. Jahrb. 53: 245-276. 1919.— See Bot. Absts. 6, Entry 1572. 



1633. Benders, A. M. Onze constitutie. [Our constitution.] Genetica 2:301-322. 

 July, 1920. 



1634. Benders. [Dutch rey. of: Lichtenstern, R. Bisherige Erfolge der Hodentrans- 

 plantation beim Menschen. (Results thus far achieved by the transplantation of testes in man.) 

 Jahreskurse f. arztliche Fortb. April, 1920.]- Genetica 2 : 374-375. July, 1920. 



1635. Bergman, Emanuel. A family with hereditary (genotypical) tremor. Hereditas 

 1 : 98-106. 2 fig. 1920. — In a Swedish family the author has observed hereditary tremor. 

 A description of the disease and descriptions of the affected persons are given. The tremor 

 is transmitted as a dominant in the family. — K. V. Ossian Dahlgren. 



1636. Bezssonoff. Sur l'obtention experimentale de la sexualite chez les champignons 

 et orientee sur la structure typique du plasma sexuel. [On the experimental production of 

 sexuality in fungi and oriented on the typical structure of the sexual plasm.] Compt. Rend. 

 Acad. Sci. Paris 170: 288-290. 1920— See Bot. Absts. 6, Entry 1344. 



1637. Blaringhem, L. Variations de la sexualite chez les Composees. [Variation of 

 sexuality in the Compositae.] Compt. Rend. Soc. Biol. [Paris] 83: 1060-1062. July, 1920. 



1638. Blaringhem, L. A propos de l'heredite des fascies de Capsella Viguieri. [Concern- 

 ing the heredity of fasciations in Capsella Viguieri.] Compt. Rend. Acad. Sci. Paris 169: 29S- 

 300. 1919. 



1639. Blaringhem, L. Production par traumatisme d'une forme nouvelle de Mais a 

 caryopses multiples, Zea Mays var. polysperma. [The traumatic origin of a new form of maize 

 with multiple fruits, Zea Mays var. polysperma.] Compt. Rend. Acad. Sci. Paris 170: 677-679. 

 1920. 



