XXIV LIST OF ILLUSTRATIONS. , 



FIG. PAGE 



95. Vertical section of the sclerotic and cornea, showing the continuity of 



their ^tissue between the dotted lines, after Todd and Bowman, . 220 



96. Longitudinal section of the globe of the eye, .... 221 



97. Lens, hardened in spirit and partially divided along the three interior 



planes, as well as into lamellae. Magnified three and a quarter 



diameters, after Arnold, ...... 222 



98. Front view of the crystalline humour or lens, in the adult, . . 222 



99. Side viewvof the adult lens, ...... 222 



100. Internal view of the iris, ...... 223 



101. External view of the iris, . . . . . . 223 



102. A representation of some of the nerves of the orbit, especially to show 



the lenticular ganglion, after Arnold, ..... 224 



103. Segment of the anterior face of the iris with its vessels injected. Mag- 



nified twenty-five diameters, after Todd and Bowman, . . 224 



104. An enlarged view of the arteries of the iris, from Arnold, . . 224 



105. Anterior segment of a transverse section of the globe of the eye seen 



from within, ........ 225 



106. Choroid and iris, exposed by turning aside the sclerotica, . . 225 



107. Optic nerves, with the origin of seven other pairs of nerves, . . 227 



108. Muscles of the eyeball, . . . . . 231 



109. Meibomian glands seen from the inner or ocular surface of the eyelids, 



with the lachrymal gland the right side, . . . .231 



110. View of tlie third, fourth, and sixth pairs of nerves, . . . 232 



111. Posterior view of the eyelids and lachrymal gland, . . . 233 



112. Lachrymal canals, . . . . . . . . 233 



113. Progress of luminous rays through the eye, .... 235 



114. Camera obscura, . . ... . . . . 238 



115. Experiment of Mariotte, ....... 253 



116. Muscse volitantes, after T. W. Jones, . . . . .256 



117. Lines of visible direction, ...... 259 



118. Accidental colours, ....... 261 



119. Myopic vision, ... . . . . . . 271 



120. Presbyopic vision, ....... 271 



121. Binocular vision. Professor Wheatstone's experiments, . . 275 



122. 123. Binocular vision, ....... 275 



124. Do. do 276 



125. Multiple vision with one eye, ...... 279 



126. Do. do. ...... 280 



127. Visual angle, . . . 284 



128. Foreshortening, ........ 275 



129. Perspective, .... .285 



130. Concave mirror, ........ 294 



131. Convex mirror, ........ 294 



132. 133. Thaumatrope, .... .295 



134. Facial line and angle of man, after Sir C. Bell, . .332 



135. Facial line and angle of orang-outang, ..... 333 



136. Old phrenological head, . . . . . . .341 



137. Phrenological head by Dolci, A. D. 1562, . . . .341 



138. 139, 140. Phrenological organs according to Gall, . . .345 



