It may be that this discrepancy with Seashore's careful laboratory
tests is due to the fact that the pupils and teachers trained by Mrs.
Copp are a selected lot, to start with.
[168] The contributions on this subject are very widely scattered
through periodical literature. The most important is Karl Pearson's
memoir (1914), reviewed in the _Journal of Heredity_, VI, pp. 332-336,
July, 1915. See also Gini, Corrado, "The Superiority of the Eldest,"
_Journal of Heredity_, VI, 37-39, Jan., 1915.
[169] _Journal of Heredity_, VIII, pp. 299-302, July, 1917.
[170] _Biometrika_, IV, pp. 233-286, London, 1905.
[171] See, for example, _Journal of Heredity_, VIII, pp. 394-396,
September, 1917. A large body of evidence from European sources, bearing
on the relation between various characters of the offspring, and the age
of the parents, was brought together by Corrado Gini in Vol. II,
_Problems in Eugenics_ (London, 1913).
[172] Davenport, Charles B., "The Personality, Heredity and Work of
Charles Otis Whitman," _American Naturalist_, LI, pp. 5-30, Jan., 1917.
[173] Gillette, John M., _Constructive Rural Sociology_, p. 89, New
York, 1916.
[174] Cook, O. F., "Eugenics and Agriculture," _Journal of Heredity_,
VII, pp.
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