Wilson, E. B.: The Chromosomes in Relation to the Determination of Sex. Science Progress, April, 1910.
Guyer, M. F.: Recent Progress in Some Lines of Cytology. Transactions of the American Microscopical Society, April, 1911.
Morgan, T. H.: Heredity and Sex. Columbia University Press, 1913.
[2] A translation of Mendel’s original papers will be found in Mendel’s Principles of Heredity, by W. Bateson.
[3] Heredity of Skin Color in Negro and White Crosses: Publication No. 188, of the Carnegie Institution of Washington.
[4] Whitman, C. O.: Animal Behavior, Biological Lectures, Marine Biological Laboratory, 1898.
[5] The Fight Against Tuberculosis and the Death Rate from Phthisis, London, Dulau & Co., 1911.
[6] Forel, August: The Sexual Question, p. 268.
[7] Loc. cit. p. 251.
[8] In this connection it is instructive to note from a Michigan state report, just off the press, that, among 4,917 insane individuals concerning whom satisfactory information was obtained, 65.4 per cent. “had among their ancestors or family such hereditary influences as insanity, apoplexy or paralysis, psychopathic abnormalities or alcoholism.” See Report of the Commission to Investigate the Extent of Feeble-mindedness, Epilepsy, Insanity and Other Conditions of Mental Defectiveness in Michigan. Wynkoop Hollenbeck Crawford Co., State Printers, Lansing, Michigan, 1915.