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‘. . . * ox ... .o. 4 : Bif with regard to the material world, we can at least go so :* ** flyoas this—we can perceive that events are brought about not by insulated: interpositions of Divine power, exerted in each particular * cosé, but by the establishment of general laws.”

* : ; WHEWELL : Bridgewater Treatise.

o “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 proficience in both.”

BACON : Advancement of Learning.

~

Down, Bromley, Kent,
October 1st, 1859. (1st Thousand.)

Third Edit., March, 1861,

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ON

OR THE A& e *: . i s
- N. o 3?
PRESERVATION OF FAWOURED RACES IN THE STR o
- FOR LIFE.

By CHARLES DARWIN, M.A.,

FELLOW OF THE ROYAL, GEOLOGICAL, LINNEAN, ETC., SOCIETIES ;
AUTHOR OF 'JOURNAL OF RESEARCHES DURING H. M. S. BEAGLE's VOYAGE ROUND THE WORLD.'

THIRD EDITION, WITH ADDITIONS AND CORRECTIONS,

(SEVENTH THousAND.)

L O N DO N :
JOHN MURRAY, ALBEMARLE STREET.

The right of Translation is reserved.

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BY THE SAME AUTHOR.

A NATURALIST'S VOYAGE ROUND THE WORLD; or

A Journal OF RESEARCHES into the NATURAL HISTORY and GeoLOGY of the
Countries visited during the Voyage of H.M.S. Beagle, under the Command of
Capt. FITz-Roy, R.N. Tenth Thousand. Post 8vo. 9s.

ON THE STRUCTURE AND DISTRIBUTION OF CORAL REEFS.

GEOLOGICAL OBSERVATIONS ON WOLCANIC ISLANDS.
GEOLOGICAL OBSERVATIONS ON SOUTH AMERICA.
A MONOGRAPH OF THE CIRRIPEDIA, 2 Wols. 8vo.

LONDON : PRINTED BY W. CLowes AND SONS, STAMFORD STREET
AND CHARING CROSS,

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ADDITIONS AND CoRRECTIONs, To THE SEcoSD AND THIRD
EDITIONS ... . . . . . . . . . . . . . . Page xi-xii

HISTORICAL SKETCH ... . . . . ... xiii-xix

INTRODUCTION ... . . . . . . . . . . . . . . . . . 1–6

C HAPTER I.
WARIATION UNDER DOMESTICATION.

Causes of Variability—Effects of Habit—Correlation of Growth — 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—Principle of Selection anciently followed, its Effects—Methodical and Unconscious Selection — Unknown Origin of our Domestic Productions—Circumstances favourable to Man's power of Selection .. ... .. 7–44

CHAPTER II.
VARIATION UNDER NATURE.

Variability — Individual differences — Doubtful species — Wide ranging, much diffused, and common species vary most—Species of the larger genera in any country vary more 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 ... .. 45–62

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