vii.]
[Footnote 19: _Ann. des Sci. Nat._, tom. xvi. p. 50.]
[Footnote 20: See _Winter Birds of Florida_, p. 206, Table F.]
[Footnote 21: See Table I, p. 211, of Allen's _Winter Birds of
Florida_.]
[Footnote 22: _Proc. Zool. Soc._, 1864, p. 64.]
[Footnote 23: J.A. Allen, on Geographical Variation among North American
Mammals, _Bull. U.S. Geol. and Geog. Survey_, vol. ii. p. 314 (1876).]
[Footnote 24: _Proc. Zool. Soc. Lond._, 1864, p. 700, and 1868, p. 28.]
[Footnote 25: See _Trans. Entomological Society of London_, 1887, p.
24.]
[Footnote 26: _Nature_, vol. xix. p. 554.]
[Footnote 27: _Nature_, vol. xvi. p. 163; and vol. xi. p. 227.]
[Footnote 28: _Ibid._, vol. xxxi. (1885), p. 533.]
[Footnote 29: _Nature_, vol. xxvi. p. 81.]
[Footnote 30: _Animals and Plants under Domestication_, vol. ii. p.
258.]
CHAPTER IV
VARIATION OF DOMESTICATED ANIMALS AND CULTIVATED PLANTS
The facts of variation and artificial selection--Proofs of the
generality of variation--Variations of apples and
melons--Variations of flowers--Variations of domestic
animals--Domestic pigeons--Acclimatisation--Circumstances
favourable to selection by man--Conditions favourable to
variation--Concluding remarks.
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