12 CONTENTS. 



CHAPTER XVI. 



SLEEP. 



General considerations Condition of the organism during sleep Dreams Re- 

 flex mental phenomena during sleep Condition of the brain and nervous 

 system during sleep Theories of sleep Anaesthesia and sleep produced 

 by pressure upon the carotid arteries Differences between natural sleep, 

 and st'jpor and coma Regeneration of the brain-substance during sleep 

 Theory that sleep is due to a want of oxygen Condition of the various 

 functions of the organism during sleep, Page 446 



