CONTENTS 



PAGE 



EDITOR'S INTRODUCTION ....0.5 



AN HISTORICAL SKETCH 



Of the Progress of Opinion on the Origin of Species 9 



INTRODUCTION 21 



CHAPTER I 

 Variation under Domestication 25 



CHAPTER II 

 Variation under Nature 58 



CHAPTER III 

 Struggle for Existence 76 



CHAPTER IV 

 Natural Selection; or the Survival op the Fittest 93 



CHAPTER V 

 Laws of Variation ^45 



CHAPTER VI 

 Difficulties of the Theory i/S 



