xii CONTENTS 



CHAPTER VI 



BRAIN AND NEEVE 



PAGE 



The general scheme The arrangement of the ganglia The spinal 

 cord The brain The development of the nervous system The 

 human brain Connections within the central nervous system 87 



CHAPTER VII 



THE SPECIAL NERVOUS MECHANISMS 



The sensory mechanisms The motor mechanisms The " simple 

 reflex" mechanism The cranio-spinal reflexes The mechanism 

 of co-ordination Cortical control - 106 



CHAPTER VIII 



THE ANALYSIS OF BEHAVIOUR 



Stimulus and response in general The lower brain activities 

 Nervous inhibition The cortex cerebri The meaning of 

 behaviour The nervous system as a whole - 130 



CHAPTER IX 



THE MECHANISTIC CONCEPTION OF LIFE 



The Cartesian mechanism The influence of chemical and physical 



investigations Modern mechanisms of life - 152 



CHAPTER X 



THE MEANING OF PERCEPTION 



The nature of sensation Perception The problem of free-will In- 

 determination in acting Memory and habit The " categories of 

 the understanding " Space and time - - 164 



CHAPTER XI 



THE NATURE OF LIFE 



The laws of thermodynamics The condition of the universe 

 Dysentropic phases in the universe Digression on orders of 

 magnitude and duration The improbability of life in the uni- 

 verse The physical nature of life Life and energy - - 192 



APPENDICES 



I. A .M MA 1-HYSICAL DISCUSSION . 222 



I'ACE IN THE MODERN THEORY OF RELATIVITY - - 235 



III. THE SUB VI AXILLARY GLAND AN INSTANCE OF ORGANIC 



FUNCTIONING - 237 



INDEX -.--.--- 241 



