Cold Spring
Harbor, L. I., June, 1913.
[92] Penrose, Clement A., _Sanitary Conditions in the Bahama Islands_,
Geographical Society of Baltimore, 1905.
[93] See von. Gruber and Ruedin, _Fortpflanzung, Vererbung,
Rassenhygiene_, p. 169, Muenchen, 1911.
[94] Davenport, Charles B., _Heredity in Relation to Eugenics_, pp. 184
ff., New York, 1911.
[95] Harris, J. Arthur, "Assortative Mating in Man," _Popular Science
Monthly_, LXXX, pp. 476-493, May, 1912. The most important studies on
the subject are cited by Dr. Harris.
[96] An interesting and critical treatment of sexual selection is given
by Vernon L. Kellogg in _Darwinism To-day_, pp. 106-128 (New York,
1908). Darwin's own discussion (_The Descent of Man_) is still very well
worth reading, if the reader is on his guard. The best general treatment
of the theory of sexual selection, especially as it applies to man, is
in chapter XI of Karl Pearson's _Grammar of Science_ (2d ed., London,
1900).
[97] Diffloth, Paul, _Le Fin de L'Enigme_, Paris, 1907.
[98] The best popular yet scientific treatment of the subject we have
seen is _The Dynamic of Manhood_, a book recently written by Luther H.
Gulick for the Young Men's Christian Association (New York, The
Association Press, 1917).
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