xlviii LIST OF FIGURES. 



FIG. PAGE 



154. Diagram to illustrate the principles of a simple form of opthalmoscope 927 



155. Figure to illustrate irradiation ........ 932 



156. The visual field of the right eye 941 



157. The visual fields (fields of sight) of the two eyes when the eyes 



converge to the same fixed point . . . . . . 942 



158. Diagram illustrating corresponding points . . . . . 943 



159. Figure to illustrate the insertions of the ocular muscles . . . 949 



160. Diagram to illustrate the actions of the ocular muscles . . . 950 



161. Diagram illustrating a simple horopter . . . . . . 957 



162. Figure to illustrate the appreciation of apparent size . . . 962 



163. The same 963 



164. Figure to illustrate an optical effect produced by parallel slanting 



lines . 963 



165. Figure to illustrate binocular vision ....... 967 



166. Diagram to illustrate the general structure of the ear . . 982 



167. The bony labyrinth 983 



168. The membrana tympani 984 



169. Diagram to illustrate the relations of auditory passage, tympanum 



and Eustachian tube 984 



170. Frontal section through the tympanum ...... 985 



171. Diagram of the median wall of the tympanum .... 985 



172. The auditory ossicles 986 



173. The ossicles in position 987 



174. The ligaments of the ossicles ' . 988 



175. The malleus and incus in position ....... 989 



176. Diagram of the outer wall of the tympanum as seen from the mesial 



side 994 



177. The stapes in position 995 



178. The membranous labyrinth as seen from above .... 1008 



179. The membranous labyrinth and the endings of the auditory nerve . 1009 



180. Diagram of a transverse section of a whorl of the cochlea . . 1010 



181. Diagram of the organ of Corti 1011 



182. Diagram of the constituents of the organ of Corti .... 1012 



183. Diagram of a laryngoscopic view of the larynx .... 1071 



184. Diagram of the superior aperture of the larynx .... 1072 



185. Diagram of the larynx in vertical section ...... 1072 



186. Diagram of the larynx in vertical transverse section . . . 1073 



187. The larynx as seen by means of the laryngoscope in different con- 



ditions of the glottis 1075 



188. Diagram of the transverse and oblique arytenoid and of the posterior 



crico-arytenoid muscles ........ 1076 



189. Diagram to illustrate the thyro-arytenoid muscles .... 1077 



190. The internal thyro-arytenoid muscle 1078 



191. The lateral crico-arytenoid muscle 1079 



192. The crico-thyroid muscle 1079 



193. Diagram to illustrate the contact of the feet with the ground in 



walking 1104 



194. Diagram to illustrate running . . 1105 



195. Diagram to illustrate the foetal circulation 1133 



