XV111 CONTENTS. 



CHAPTER LIT. 



PAQB 



TASTE AND SMELL 704 



Taste 704 



Smell 710 



CHAPTER LIII. 



HEARING 713 



Anatomy of the Ear . . .713 



Physiology of Hearing 722 



CHAPTER LIV. 



VOICE AND SPEECH 727 



Anatomy of the Larynx 727 



Movements of the Vocal Cords 734 



The Voice 735 



Speech ............ 737 



Defects of Speech 738 



CHAPTER LV. 



THE EYE AND VISION 740 



The Eyeball 741 



The Eye as an Optical Instrument 755 



The Ophthalmoscope 770 



The Perimeter 774 



Fovea Centralis 774 



Colour Sensations 776 



Changes in the Retina during activity . . . . . . 780 



Various Positions of the Eyeballs 783 



Nervous Paths in the Optic Nerves 785 



Visual Judgments 787 



CHAPTER LVI. 



TROPHIC NERVES 790 



CHAPTER LVII. 



THE REPRODUCTIVE ORGANS 792 



Male Organs 793 



Female Organs 79^ 



