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THE ORIGIN OF SPECIES.

"But with regard to the material world, we can at least go so far as this-we can perceive that events are brought about not by insulated interpositions of Divine power, exerted in each particular case, but by the establishment of general laws."

WHEWELL: Bridgewater Treatise.

"The only distinct meaning of the word 'natural' is stated, fixed, or settled; since what is natural as much requires and presupposes an intelligent agent to render it so, i.e., to effect it continually or at stated times, as what is supernatural or miraculous does to effect it for once."

BUTLER Analogy of Revealed Religion.

"To conclude, therefore, let no man out of a weak conceit of sobriety, or an ill-applied moderation, think or maintain, that a man can search too far or be too well studied in the book of God's word, or in the book of God's works; divinity or philosophy; but rather let men endeavour an endless progress or proficence in both.” BACON: Advancement of Learning.

Down, Beckenham, Kent,

First Edition, November 24th, 1859.

Sixth Edition, Jan. 1872.

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PRESERVATION OF FAVOURED RACES IN THE
STRUGGLE FOR LIFE.

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THE DESCENT OF MAN, AND SELECTION
IN RELATION TO SEX. A New Library Edition in
large type. Woodcuts. 2 vols. Crown 8vo. 158.

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VARIATION UNDER DOMESTICATION.

Causes of Variability-Effects of Habit and the use or disuse of
Parts Correlated Variation Inheritance-Character of
Domestic Varieties-Difficulty of distinguishing between
Varieties and Species-Origin of domestic varieties from one or
more species-Domestic Pigeons, their Differences and Origin—
Principles of Selection, anciently followed, their Effects-
Methodical and Unconscious Selection-Unknown Origin of our
Domestic Productions-Circumstances favourable to Man's
power of Selection

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CHAPTER II.

VARIATION UNDER NATURE.

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Variability Individual differences - Doubtful species - Wide
ranging, much diffused, and common species, vary most—
Species of the larger genera in each country vary more fre-
quently than the species of the smaller genera-Many of the
species of the larger genera resemble varieties in being very
closely, but unequally, related to each other, and in having
restricted ranges
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