CONTENTS 



CHAPTER I 



AG 



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 



