12 LIST OF ILLUSTRATIONS 



FIG- PAGE 



35. Circulation of the blood, 



36. External view of the heart, J PP S 



37. Section of the heart 155 



38. Valves of heart with walls relaxed 156 



39. Valves of heart during contraction of ventricles . . . 156 



40. Left section of the heart, ") 



41. Right section of the heart, I Opp site ' ' \ ' * 158 



42. Form of the pulse " .162 



43. Vein with valves open . 163 



44. Vein with valves closed 163 



45. Web of frog's foot, magnified ....... 165 



46. Margin of frog's web ......... 165 



47. Organs of the chest 178 



48. Larynx, trachea, and bronchial tubes . . . . . .179 



49. Diagram and section of the air-cells 179 



50. Section of the lungs . 180 



51. Section of mouth and throat ....... 181 



52. Ciliated cells 182 



53. Ventilation by window 199 



54. Cerebro-spinal system 210 



55. Upper surface of the cerebrum . . . . . . .211 



56. Vertical section of the brain ....... 212 



57. Lower surface of the brain ....... 213 



58. Brain and spinal cord 215 



59. Section of spinal cord . . . 216 



60. Illustrating the functions of the spinal nerves .... 221 



61. An experiment with sense of touch ...... 260 



62. Section of nasal cavity ........ 269 



63. Front view of the eye 276 



64. Vertical section of the eye, magnified. ..... 279 



65. Front section of eyeball 281 



66. Diagram of blind point of the eye 283 



67. The retinal image 286 



68. The different shapes of the globe of the eye .... 288 



69. The function of accommodation ....... 290 



70. The ear and its different parts ....... 294 



71. Showing the internal mechanism of the ear, magnified . . 296 



72. Section of the right ear 298 



73. Section of the larynx and trachea 311 



74. A view of the vocal cords by means of the laryngoscope . .312 



75. The different positions of the vocal cords 313 



76. Double convex and plano-convex lenses 321 



77. Simple microscope ......... 322 



78. Compound microscope ........ 323 



