CONTENTS 



CHAPTER I 

 GENERAL INTRODUCTION 



PAGE 



Historical Account of the Work on Regeneration of Trembley, Bonnet, and 



Spallanzani I 



Some Further Examples of Regeneration . . 6 



Definition of Terms 19 



CHAPTER II 

 THE EXTERNAL FACTORS OF REGENERATION IN ANIMALS 



The Effect of Temperature 26 



The Effect of Food 27 



The Effect of Light 29 



The Effect of Gravity 30 



The Effect of Contact 33 



The Effect of Chemical Changes in the Environment 35 



General Conclusions 36 



CHAPTER III 

 THE INTERNAL FACTORS OF REGENERATION IN ANIMALS 



Polarity and Heteromorphosis 38 



Lateral Regeneration 43 



Regeneration from an Oblique Surface 44 



The Influence of Internal Organs at the Cut-surface 52 



The Influence of the Amount of New Material 54 



The Influence of the Old Parts on the New 62 



The Influence of the Nucleus on Regeneration 65 



The Closing in of Cut-edges .......... 69 



ix 



