as from the mother. Like twins are conceived from the same egg cell. No two germ cells contain exactly the same combination of hereditary tendencies. Changes in environment and organism affect posterity, not directly, but only through other changes produced in its germinal matter. Hence efforts to reach high food cannot directly produce the giraffe. See Dawson, Modern Ideas of Evolution, 235-239; Bradford, Heredity and Christian Problems; Ribot, Heredity; Woods, Heredity in Royalty. On organic unity in connection with realism, see Hodge, in Princeton Rev., Jan. 1865:125-135; Dabney, Theology, 317-321.

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