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IntroductionEssay Of 18421. Part 12. Part 2Essay Of 1844 - Part 11. Chapter 1. On The Variation Of Organic Beings Under Domestication...2. Chapter 2. On The Variation Of Organic Beings In A Wild State...3. Chapter 3. On The Variation Of Instincts...Essay Of 1844 - Part 21. Chapter 4. On The Number Of Intermediate Forms Required On The Theory Of Common Descent...2. Chapter 5. Gradual Appearance And Disappearance Of Species3. Chapter 6. On The Geographical Distribution Of Organic Beings In Past And Present Times4. Chapter 7. On The Nature Of The Affinities...5. Chapter 8. Unity Of Type In The Great Classes; And Morphological Structures6. Chapter 9. Abortive Or Rudimentary Organs7. Chapter 10. Recapitulation And Conclusion