LONDON: JOHN MURRAY, ALBEMARLE STREET. 1859.

From On the Origin of Species by Charles Darwin.

“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.”

W. WHEWELL: _Bridgewater Treatise_.

“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_, 1_st_, 1859.

Contents

INTRODUCTION. 1. VARIATION UNDER DOMESTICATION. 2. VARIATION UNDER NATURE. 3. STRUGGLE FOR EXISTENCE. 4. NATURAL SELECTION. 5. LAWS OF VARIATION. 6. DIFFICULTIES ON THEORY. 7. INSTINCT. 8. HYBRIDISM. 9. ON THE IMPERFECTION OF THE GEOLOGICAL RECORD. 10. ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS. 11. GEOGRAPHICAL DISTRIBUTION. 12. GEOGRAPHICAL DISTRIBUTION—_continued_. 13. MUTUAL AFFINITIES OF ORGANIC BEINGS: MORPHOLOGY: 14. RECAPITULATION AND CONCLUSION. INDEX

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