[193] Or it may be supposed that the environment is so good as to make a non-selective death less likely, and therefore such deaths as do occur must more frequently be selective.
[194] Hibbs, Henry H., Jr., Infant Mortality: Its Relation to Social and Industrial Conditions, New York, 1916.
[195] See Castle, W. E., Heredity, pp. 30-32, New York, 1911.
[196] Doll, E. A., "Education and Inheritance," Journal of Education, Feb. 1, 1917.
[197] Atwater's celebrated experiments proved that all the energy (food) which goes into an animal can be accounted for in the output of heat or work. They are conveniently summarized in Abderhalden's Text-book of Physiological Chemistry, p. 335.
[198] In this connection see farther Raymond Pearl's review of Mr. Redfield's "Dynamic Evolution" (Journal of Heredity) VI, p. 254, and Paul Popenoe's review, "The Parents of Great Men," Journal of Heredity, VIII, pp. 400-408.
[199] See Dr. Hrdlička's communication to the XIXth International Congress of Americanists, Dec. 28, 1915 (the proceedings were published at Washington, in March, 1917); or an account in the Journal of Heredity, VIII, pp. 98 ff., March, 1917.
[200] Cf. Grant, Madison, The Passing of the Great Racep. 74 (New York, 1916): "One often hears the statement made that native Americans of Colonial ancestry are of mixed ethnic origin. This is not true. At the time of the Revolutionary War the settlers in the 13 colonies were not only purely Nordic, but also purely Teutonic, a very large majority being Anglo-Saxon in the most limited meaning of that term. The New England settlers in particular came from those counties in England where the blood was almost purely Saxon, Anglian, and Dane."
[201] Comprising Armenians, Croatians, English, Greeks, Russian Jews, Irish, South Italians, North Italians, Magyars, Poles, Rumanians and Russians, 500 individuals in all.
[202] English data from K. Pearson, Biometrika V, p. 124.