CONTENTS 13 



CHAPTER LVIIl 



Page 



The Protective Mechanisms of the Nervous System 716 



PART VI 

 THE SENSE-ORGANS 



SECTION XX 

 SPECIAL SOMATIC AND VISCERAL RECEPTORS 



CHAPTER LIX 

 Classification of the Sense-organs 727 



CHAPTER LX 

 The Senses of Pressure or Touch, Pain, and Temperature 734 



CHAPTER LXI 

 The Senses of Smell, Taste, Hunger and Thirst 743 



SECTION XXI 

 THE SENSE OF HEARING 



CHAPTER LXll 

 The Cause and Character of the Sound Waves 756 



CHAPTER LXIIl 

 The External and Middle Portions of the Ear 763 



CHAPTER LXIV 

 The Internal Ear or Labyrinth 771 



SECTION XXII 

 THE SENSE OF EQUILIBRIUM 



CHAPTER LXV 

 The Sense of Position. Static Sense 781 



CHAPTER LXVI 



The Sense of Movement — Dynamic Sense 785 



