No. 3, April, 1921] GENETICS 259 



178S. Klebahn, H. Impfversuche mit Pfropfbastarden. [Infection experiments with 

 graft hybrids.] Flora 111-112^ 418-430. 1918.— See Bot. Absts. 7, Entry 1800. 



1789. KoLTONSKi, Hermann. tJber Erblichkeit der Ovarial-, besonders der Dermoid- 

 cysten. [On the inheritance of ovarial cysts, especially the dermoid cysts.] Zeitschr. Krebs- 

 forsch. 17:408-416. 1920. 



1790. KoTowsKi, Feliks. Zmienn6s6 i Korrelacye w "czystej linii" pszenicy. Tr. vulgare 

 Ostka biala dublanska. [Correlation and variability in a pure line of wheat.] Polnisch: 

 Tygodnika Rolniczy, Krakau 1919. — See Bot. Absts. 7, Entry 1702. 



1791. KuTTNER, O. [German rev. of: Woltereck, Rich. Variation und Artbildung. 

 Analytische und experimentelle Untersuchungen an pelagischen Daphniden und anderen Cla- 

 doceren. Erster Teil: Morphologische, entwicklungsgeschichtliche und physiologische 

 Variations-Analyse. (Variation and species formation. Analytical experimental studies on 

 pelagic Daphnias and other Cladocera. Part I. Analysis of morphological, embryo logical, and 

 physiological variation.) 145 p., 6 pi., 55 fig. Bern, 1919.] Zeitschr. Indukt. Abstamm. u. 

 Vererb. 24: 179-182. Sept., 1920. 



1792. Laxtghlin, Harry H. Calculating ancestral influences in man. A mathematical 

 measure of the demonstrated facts of bisexual heredity. Proc. Nation. Acad. Sci. [U.S.] 6: 

 235-242. 2 charts. May, 1920.— An abstract of a more extensive discussion not yet published. 

 "The principles set forth" in the larger paper, "make possible the mathematical formula- 

 tion of an indefinitely great number of complex situations in reference to ancestral influ- 

 ence," of which twenty-seven formulae have been developed. The application of eight of 

 these to the first five ancestral generations in man have been worked out and charted. The 

 present abstract reproduces the eight formulae with accompanying charts showing the result 

 of their application to the first three ancestral generations of man.— The calculations are 

 based on the assumption of 24 somatic chromosomes with sexual heterozygosity in the male 

 and without provision for mutation, crossing over, etc., as such special phenomena are not yet 

 measurable in man and the "present forumlae will not be upset by such corrections" when 

 later introduced. The formulae as set forth are foundational and are stated in general terms 

 applicable to all forms of bisexual heredity. — Howard J. Banker. 



1793. Laughlin, Harry H. Population schedule for the census of 1920. Jour. Heredity 

 10: 208-210. 1919. — A proposed addition by eugenists and genealogists to the general enum- 

 eration of the census which would record the name of the father and the maiden name of the 

 mother of every person enumerated. This would permit analysis of census returns on the 

 personal and family-history basis. The reasons and benefits for such enumerations are 

 given as stated and unanimously adopted by the Eugenics Research Association. — ■/. //. 

 Beaumont. 



1794. Laurie, D. F. Evolution, heredity and breeding. Jour. Dept. Agric. South Aus- 

 tralia 23 : 692-697. 1920. — The writer emphasizes the importance to workers in heredity of 

 the investigations of biochemists. He cites Morgan's castration experiments on Seabright 

 cocks as indicating that the Mendelian "factor" inhibiting the appearance of a character is 

 located in the testes and due to hormonic influence. Luteal cells are present in the testes of 

 the hen-feathered cocks. He quotes the address of Professor A. Keith at the British Asso- 

 ciation at Bournemouth (Nature, Nov. 13, 1919) in which the predominance of certain dis- 

 tinctive features of the three types, — European, Chinaman, and Negro — are attributed to the 

 influence of the organs of internal secretion. "If the selective action of alpha proteins in 

 food in regard to the activity or repression of the organs of internal secretion which are 

 known to affect growth, and normal or abnormal developments, is ultimately proved, then 

 Mendelians are faced with a difficult position in regard to the continuity of the germ-plasm. 

 Nothing can be added. On the other hand, Bateson's view of the shedding of inhibiting fac- 

 tors may not be affected, because, except in pathological or post-operative conditions, the 

 factor would not be influenced by immediate endocrinal action." — A. F. Chidester. 



BOTANICAL ABSTRACTS, VOL. VII, KO. 3 



