CONTENTS 



PAGE 



INTRODUCTORY LETTER TO SENATOR MOSSO . . . vii 



CHAPTER I 

 THE CONDITION OF OLD AGE ...... I 



CHAPTER II 

 CYTOMORPHOSIS: THE CELLULAR CHANGES OF AGE . . 38 



CHAPTER III 

 THE RATE OF GROWTH . 86 



CHAPTER IV 

 DIFFERENTIATION AND REJUVENATION . . . 131 



CHAPTER V 

 REGENERATION AND DEATH 169 



CHAPTER VI 

 THE FOUR LAWS OF AGE 2l8 



APPENDIX I 

 GROWTH OF RABBITS . ....... 253 



APPENDIX II 

 GROWTH OF CHICKENS 258 



APPENDIX III 

 DEATH OF PROTOZOA . . . . 262 



