Paul H. Barrett, R. B. Freeman, Charles Darwin

• Introduction; Chapter I Variation Under Domestication; Chapter II Variation Under Domestication; Chapter III Struggle for Existence; Chapter IV Natural Selection; Or the Survival of the Fittest; Chapter V Laws of Variation; Chapter VI Difficulties of the Theory; Chapter VII Miscellaneous Objections to the Theory of Natural Selection; Chapter VIII Instinct; Chapter IX Hybridism; Chapter X On the Imperfection of the Geological Record; Chapter XI On the Geological Succession of Organic Beings; Chapter XII Geographical Distribution; Chapter XIII Geographical Distribution – continued; Chapter XIV Mutual Affinities of Organic Beings: Morphology: Embryology: Rudimentary Organs; Chapter XV Recapitulation and Conclusion;

Paul H. Barrett, R. B. Freeman, Charles Darwin

• Introduction; Chapter I Variation Under Domestication; Chapter II Variation Under Domestication; Chapter III Struggle for Existence; Chapter IV Natural Selection; Or the Survival of the Fittest; Chapter V Laws of Variation; Chapter VI Difficulties of the Theory; Chapter VII Miscellaneous Objections to the Theory of Natural Selection; Chapter VIII Instinct; Chapter IX Hybridism; Chapter X On the Imperfection of the Geological Record; Chapter XI On the Geological Succession of Organic Beings; Chapter XII Geographical Distribution; Chapter XIII Geographical Distribution – continued; Chapter XIV Mutual Affinities of Organic Beings: Morphology: Embryology: Rudimentary Organs; Chapter XV Recapitulation and Conclusion;

Paul H. Barrett, R. B. Freeman, Charles Darwin

• Introduction; Chapter I Variation Under Domestication; Chapter II Variation Under Domestication; Chapter III Struggle for Existence; Chapter IV Natural Selection; Or the Survival of the Fittest; Chapter V Laws of Variation; Chapter VI Difficulties of the Theory; Chapter VII Miscellaneous Objections to the Theory of Natural Selection; Chapter VIII Instinct; Chapter IX Hybridism; Chapter X On the Imperfection of the Geological Record; Chapter XI On the Geological Succession of Organic Beings; Chapter XII Geographical Distribution; Chapter XIII Geographical Distribution – continued; Chapter XIV Mutual Affinities of Organic Beings: Morphology: Embryology: Rudimentary Organs; Chapter XV Recapitulation and Conclusion;