XX LIST OF ILLUSTRATIONS. 



FIG. PAGE 



92. Nerve cells, with capsular sheaths . . . (Key and Retzius) 357 



93. Nerve cell, with axis cylinder process . . (Key and Retzius) 358 



94. Frog's leg, showing galvanization of the muscles .... 361 



95. Frog's leg, showing galvanization of the nerve .... 302 



96. Diagram of registering apparatus 368 



97. Transverse section of the spinal cord 374 



98. Brain of alligator . . . 375 



99. Brain of pigeon 376 



100. Medulla oblongata and base of the brain . . . (Hirschfeld) 377 



101. Diagrammatic section of the human brain 379 



102. Transverse sections of human spinal cord 382 



103. Transverse section of the spinal cord ; lumbar region . . . 383 



104. Transverse section, at the decussation of the pyramids . . . 385 



105. Degeneration of divided nerves and nerve roots .... 390 



106. Degeneration of the pyramidal tracts 395 



107. Partial sections of spinal cord, in rabbit . . . (Woroschiloff) 396 



108. Degeneration of columns of Goll ..... (Charcot) 408 



109. Lateral sclerosis of posterior columns of spinal cord . (Charcot) 408 



110. Fissures and convolutions of the human brain 414 



111. Horizontal section of the human brain ...... 417 



112. Vertical section of a cerebral convolution . . . (Henle) 418 



113. Brain of the dog ; viewed from above ; centres of motion . . 427 



114. Brain of the dog ; viewed in profile ; "... 428 



115. Excision of angular convolution ; left side ..... 431 



116. Excision of angular convolution ; right side ..... 431 



117. Brain of healthy pigeon, profile view ...... 437 



118. Brain of operated pigeon, profile view *. 437 



119. Brain of the cod, showing optic nerves 451 



120. Brain of the fowl, showing optic nerves 451 



121. Diagram of the optic nerves and tracts ...... 453 



122. Lesions of the optic nerves and tracts 454 



123. Diagram of the fifth nerve, and its distribution .... 460 



124. Diagram of the facial nerve, and its distribution .... 469 



125. Portrait of facial paralysis 472 



126. Facial nerve and connections, in the aqueduct of Fallopius . . 475 



127. Ninth, tenth, and eleventh cranial nerves. . . (Hirschfeld) 483 



128. Ganglia and nerves of the sympathetic system 498 



129. Distribution of nerves in the nasal passages 517 



130. Horizontal section of the right eyeball 519 



131. Vision without a lens 524 



132. Vision with a lens 524 



133. Indistinct image, from excessive refraction 525 



134. Indistinct image, from deficient refraction 525 



135. Rods and cones, of human retina .... (Schultze) 527 



136. Surface of the retina, showing ends of rods and cones (Helmholtz) 528 



137. Diagram, for showing blind spot of the retina . . (Helmholtz) 530 



138. Section of the retina, through macula lutea and fovea (Schultze) 532 



139. Section of the eyeball, showing direct and indirect vision . . 540 



140. Catoptric images in the eye (Helmholtz) 542 



141. Change of position in catoptric images during accommodation 



(Helmholtz) 542 



142. Emmetropic eye, iD vision at long distances . . . (Wundt) 545 



