XY111 CONTENTS. 



PAGE 



3. Physiology of Audition . . . . .189 



Sense of Sight or Vision ....... 205 



1. Light ........ 206 



2. Anatomy of the Organ of Vision . . . . .214 



3. Accessory Organs . . . . . . 229 



4. Physiology of Vision ...... 234 



5. Phenomena of Vision . . . . . .253 



Additional Senses . . . . . . . .296 



b. Internal Sensations . . . . . . 299 



Mental Faculties, &c. . . . . . . .301 



1. Physiology of the Intellectual and Moral Faculties . . 321 



CHAP. II. Of Muscular Motion, especially of Locomotility or Voluntary Motion . 362 



1. Anatomy of the Motory Apparatus . . . . . 362 



2. Muscles -.362 



3. Bones ......... 376 



4. Physiology of Muscular Motion ...... 383 



5. Attitudes ........ 437 



6. Movements ..... ... 443 



7. Locomotive Movements ...... 445 



a. Walking . . . . . . . .445 



fe. Leaping . ....... 447 



c. Running ........ 448 



d. Swimming ....... 449 



e. Flying ......... 452 



/. Other varieties of Muscular Action .... 452 



8. Function of Expression or of Language 454 



a. Of the Voice ....... 454 



1. Anatomy of the Vocal Apparatus . . . 454 



2. Physiology of the Voice . . . . .459 



1. Intensity or Strength of Voice . . . . .463 



2. Tone of Voice ...... 463 



3. Timbre or Quality of Voice . . . . .471 



3. Natural or Inarticulate Language .... 478 



4. Artificial or Articulate Language . . . . .480 



5. Singing . . . . 491 



b. Gestures ........ 493 



Ciliary Motion ....... 509 



BOOK II. 



NUTRITIVE FUNCTIONS. 



CHAP. I. Digestion 



1. Anatomy of the Digestive Organs . 512 



2. Food of Man . .540 



3. Physiology of Digestion . . 553 



4. Digestion of Solid Food . 



a. Hunger ... 



b. Prehension of Food . . . .561 



c. Oral or Buccal Digestion 



d. Deglutition ...... . 568 



