CONTENTS 



PAR* 



INTRODUCTION 



CHAPTER I 



THE EVOLUTION OF LIFE MECHANISM AND TELEOLOGY 



Of duration in general Unorganized bodies and abstract time 

 Organized bodies and real duration Individuality and the 

 process of growing old . . . . i 



Of transformism and the different ways of interpreting it Radical 

 mechanism and real duration : the relation of biology to 

 physics and chemistry Radical finalism and real duration : 

 the relation of biology to philosophy . . . .24 



The quest of a criterion Examination of the various theories with 

 regard to a particular example Darwin and insensible 

 variation De Vries and sudden variation Eimer and ortho 

 genesis Neo-Lamarckism and the hereditability of acquired 

 characters ..... 56 



Result of the inquiry The vital impetus ... 89 



CHAPTER II 



THE DIVERGENT DIRECTIONS OF THE EVOLUTION OF LIFE 

 TORPOR, INTELLIGENCE, INSTINCT 



General idea of the evolutionary process Growth Divergent 

 and complementary tendencies The meaning of progress and 

 of adaptation . . 103 



The relation of the animal to the plant General tendency of 



animal life The development of animal life . . . 1 1 1 



The main directions of the evolution of life : torpor, intelligence, 



instinct . .... 142 



The nature of the intellect . . . . 160 



The nature of instinct ... . . 174 



Life and consciousness The apparent place of man in nature . 186 



vii 



