CONTENTS. xiii 



PHYSIOLOGY OF THE CEREBRAL AND SPINAL NERVES, continued. 



Physiology of the Glosso-Pharyngeal Nerve . . . 553 



Physiology of the Pneumogastric Nerve . . . 557 



Physiology of the Spinal Accessory Nerve . . . 564 



Physiology of the Hypoglossal Nerve 565 



Physiology of the Spinal Nerves 567 



PHYSIOLOGY OF THE SYMPATHETIC NERVE ib. 



CHAPTER XVII. 



CAUSES AND PHENOMENA OF MOTION 578 



CILIAP.Y MOTION ib. 



MUSCULAR MOTION 580 



Muscular Tissue ........ ib. 



Properties of Muscular Tissue . . . . . 587 



Action of the Voluntary Muscles . .... 595 



Action, of the Involuntary Muscles .... 602 



Source of Muscular Action ib. 



CHAPTER XVIII. 



OF VOICE AND SPEECH 6o4 



Mode of Production of the Human Voice . . . . ib. 



The Larynx 606 



Application of the Voice in Singing and Speaking . . 614 



SPEECH 619 



CHAPTER XIX. 



THE SENSES 622 



THE SENSE OF SMELL 630 



THE SENSE OF SIGHT . 636 



Structure of the Eye ....... ib. 



Phenomena of Vision 645 



Eeciprocal Action of different parts of the Retina . 66 1 



Simultaneous Action of the two Eyes . . . . 664 



