CONTENTS 



CHAPTER I 



PAGE 



INTRODUCTORY REMARKS i 



CHAPTER II 



THE SPECIFIC DIFFERENCE BETWEEN LIVING AND 

 DEAD MATTER AND THE QUESTION OF THE 

 ORIGIN OF LIFE 14 



CHAPTER III 



THE CHEMICAL BASIS OF GENUS AND SPECIES: 40 

 I. THE INCOMPATIBILITY OF SPECIES NOT 



CLOSELY RELATED 44 



II. THE CHEMICAL BASIS OF GENUS AND SPECIES 



AND OF SPECIES SPECIFICITY ... 53 



CHAPTER IV 



SPECIFICITY IN FERTILIZATION . . . .71 



CHAPTER V, 

 ARTIFICIAL PARTHENOGENESIS 95 



CHAPTER VI 



DETERMINISM IN THE FORMATION OF AN ORGANISM 



FROM AN EGG 128 



ix 



