CONTENTS. 



PART II. {Continued^ 

 Archebiosis. 



CHAPTER XII. 



Pages 



Explanation of Apparent Discrepancies and Difficulties .. 1-41 



CHAPTER XIII. 



Crystals and Organisms : Causes which determine their Form 



and Structure .. .. .. .. .. 42-85 



CHAPTER XIV. 

 The Fundamental Properties of Living Matter .. .. 86-119 



CHAPTER XV. ' 



Development of the Primordial Forms of Life : their Relation- 

 ship to one another .. .. .. .. .. 120-167 



PART III. 

 Heterogenesis. 



CHAPTER XVI. 

 Ancient and Modern Views concerning Heterogenesis .., 171-191 



CHAPTER XVII. 

 Synthetic Heterogenesis 192-263 



CHAPTER XVIII. 

 The Panspermic Hypothesis 264-306 



