XVI LIST OF ILLUSTRATIONS. 



FIG. PAG 



117. View of the Larynx 253 



118. . 253 



119. Koenig's Apparatus, ......... 254 



120. Neuramcebometer (after Obersteiner), 260 



121. Scheiner's Experiment, 266 



122. Diffusion (Helmlwltz), 267 



123. Phakoscope, 269 



124. Marriotte's Experiment, ........ 272 



125. 272 



126. Blind Spot (Helmholtz), . 273 



127. Bergmann's Experiment (Helmhollz) 275 



128. Disc for Talbofs Law (Helmholtz}, 277 



129. Perimeter, 278 



130. Irradiation, 280 



131. ,, (Hzlmholtz), 280 



132. ,, 280 



133. Imperfect Visual Judgment, .281 



134. Ziillner's Lines, 281 



135. Perception of Size (Helmholtz), 282 



136. Spiral Disc for Contrast, (Helmholtz), 283 



137. Kiihne's Eye (Jung), 285 



138. Partly Coloured Disc for Contrast (Helmholtz), . .288 



139. Rotatory Disc (Helmholtz), 290 



140. R. Scina's Experiment (Rood), 291 



141. Carriage for Rabbit (Stirling), ....... 297 



142. Aristotle's Experiment, 298 



