12 LIST OF ILLUSTRATIONS 



FIG. PAGE 



35. Circulation of the blood, v 



36. External view of the heart, J PP S 



37. Section of the heart 162 



38. Valves of heart with walls relaxed 163 



39. Valves of heart during contraction of ventricles . . . 163 



40. Left section of the heart, ) 



41. Right section of the heart, } 0pposlte 166 



42. Form of the pulse 169 



43. Vein with valves open . .171 



44. Vein with valves closed .171 



45. Web of frog's foot, magnified 173 



46. Margin of frog's web . . . . . . . . . 173 



47-. Organs of the chest 188 



48. Larynx, trachea, and bronchial tubes . . . . . . 189 



49. Diagram and section of the air-cells 189 



50. Section of the lungs 190 



51. Section of mouth and throat ....... 191 



52. Ciliated cells 192 



53. Ventilation by window . . . ... . . . 209 



54. Cerebro-spinal system 220 



55. Upper surface of the cerebrum 222 



56. Vertical section of the brain 223 



57. Lower surface of the brain 224 



58. Brain and spinal cord . . . . . . . . . 228 



59. Section of spinal cord ......... 229 



60. Illustrating the functions of the spinal nerves .... 234 



61. An experiment with sense of touch 273 



* 62. Section of nasal cavity . - 282 



63. Front view of the eye 289 



64. Vertical section of the eye, magnified ...... 292 



65. Front section of eyeball ........ 294 



66. Diagram of blind point of the eye . . . . . . 296 



67. The retinal image 299 



68. The different shapes of the globe of the eye . . . 301 



69. The function of accommodation * . 303 



70. The ear and its different parts . 307 



71. Showing the internal mechanism of the ear, magnified . . 309 



72. Section of the right ear 311 



73. Section of the larynx and trachea . . . ... .324 



74. A view of the vocal cords by means of the laryngoscope . . 325 



75. The different positions of the vocal cords f . . . : . 326 



76. Double convex and plano-convex lenses 334 



77. Simple microscope 335 



78. Compound microscope 336 



