Volitions as tropisms, 199. Volvox, 25, 26, 27. War, eugenical effects of, 299. Wasserman, provocative, 189. Wasserman test, 188, 189. Webbed digits, 65. Weeks, 251, 252, 253, 291. West, 167. Wheat, 75, 81, 88. Whetham, 314, 316. Whitman, 145. Wilmarth, 243, 245, 274, 291. Wilson, 59, 62, 94, 95. Woods, 296. X-element, 57, 58. Zebra hybrids, 10. Zeros, the, 271. Zygote: 26, 27; chromosomes of, 40. FOOTNOTES: [1] The reader desiring more detailed information will find fuller discussions in the following: Wilson, E. B.: _Recent Researches on the Determination and Heredity of Sex_. Science, January 8, 1909. 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. [9] _Feeble-mindedness; Its Causes and Consequences_, by Henry H. Goddard, The Macmillan Company, 1914. [10] _The Binet-Simon Measuring Scale for Intelligence_, by Henry H. Goddard, 1911. The Training School, Vineland, N. J. Price 15 cents. [11] "Tests for Mental Defects," by Howard A. Knox, _Journal of Heredity_, March, 1914. See also Knox: _Journal of the American Medical Association_, 1914. [12] _The Individual Delinquent_, by William Healy, M. D. Little, Brown & Co., Boston. [13] _The Individual Delinquent_, by William Healy, M. D. Little, Brown & Co., Boston. [14] The Psycopathic Laboratory in connection with the Juvenile Court of Chicago. [15] See "The Foreign Born in the United States." _The National Geographic Magazine_, September, 1914.