LIST OF ILLUSTRATIONS. xv 



FIG. PAGE 



312. Section through the Uncoiled Cochlea (I) and through the Terminal Nerve 



Apparatus of the Cochlea (II). MUNK, after HENSEN) 756 



313. Section of the Ductus Cochlearis and the Organ of Corti. (After LANDOIS). .. 757 



314. Connections of Cochlea with Central Nervous System. (PATON)...' 758 



315. Connections of Semi-circular Canals with Central Nervous System. (PATON) . 759 



316. I. The Mechanics of the Auditory Ossicles. (After HELMHOLTZ.) II. Section 



of the Middle Ear. (MUNK, after HENSEN) 763 



317. Schema of the Semi-circular Canals, the Posterior Part of the Skull Removed. 



(HEDON, after EWALD) 767 



318. Semi-circular Canals on Right Side Destroyed. Commencing rotation of head 



of pigeon about five days after operation. (After EWALD) ; 768 



319. Twisting of the Head of a Pigeon twenty days after removal of all the semi- 



circular canals on the right side. (EWALD, J. R.) 769. 



320. Position of Pigeon's Head after removal of all the semi-circular canals on both 



sides. (EWALD, J. R.) 770 



321. Diagram of Horizontal Section through the Human Eye. (YEO) 772 



322. Anterior-posterior Section of the Eyeball. (LEVEILLJE) 773 



323. Section through the Human Cornea. (BOHM and DAVIDOFF) 774 



324. Corneal Corpuscles of Dog. (B6HM and DAVIDOFF) 774 



325. Corneal Nerves of the Pig. (ROLLET) 775 



326. Diagram of the Vessels of the Eye. (LEBER) 776 



327. Meridional Section of the Human Ciliary Body. (B6HM and DAVIDOFF) 777 



328. Dissection of the Zonula. (After SCHUI/TZE) 778 



329. Lateral View of the Orbit, Showing the Nerves. (DEAVER) 779 



330. The Nervous Mechanism of the Iris 780 



331. Isolated Lens Fibers. (J. ARNOLD) 781 



332. Transverse Section of Lens Fibers. (J. ARNOLD) 782 



333. Anterior Surface of the Lens of an Adult. (J. ARNOLD) 782 



334. Diagram of the Structure of Human Retina According to Golgi's Method. 



(GREEFF) 783 



335. Hexagonal Cells from the Pigment Layer of the Retina of a Rabbit. (BALL). 784 



336. Action of the Light on Retina. Section of retina of Frog. (ENGLEMANN). .. . 785 



337. Right Eye, Normal Fundus Oculi. (BALL) ..786 



338. Diagram of the Occipital Region of Right Cerebral Hemispheres. (BALL) 787 



339. Diagram of the Lymph Spaces of the Eyeball. (After FUCHS) 789 



340. Schematic Eye Three Times Natural Size. (LANDOLT) 790 



341. Diagram Illustrating Spherical .Aberrations. (GANOT) 794 



342. Scheme of Accommodation for Near and Distant Objects. (LANDOIS, after 



HELMHOLTZ) ; . .-, 795 



343. Refraction of Parallel Rays of Light in Emmetropia (E), Hypermetropia (H), 



and Myopia (M). (BALL) 797 



344. Different Kinds of Lenses. (GANOT) 798 



345. Refraction of Rays in Regular Astigmatism. (BALL) 798 



346. Diagram Showing Refraction by a Double Convex Lens. (GANOT) 799 



347. Concave Lens Diverging Parallel Rays of Light. (LAHOUSSE) 799 



348. Purkinje-Sanson Images. (BALL) 800 



349. Diagram to show the Blind Spot in the Visual Field. (BALL) 800 



350. Scheiner's Experiment an experiment to determine the minimum distance of 



Distinct Vision 801 



351. Diagram to show that the visual angle and size of the retinal image vary with 



the distance of the object from the eye. (BALL) 801 



352. Diagram Showing the Corneal Axis, U-E; the Optic .Axis, O-A; the visual 



Line, R-Y; the Line of Fixation, R-J; and the Three Angles. (BALL).. 802 



353. The Horopteric Circle of Muller. (BALL) 803 



354. The Visual Angle 804 



355. Optogram of the Rabbit's Retina of a Window Four Meters Distant. (KUHNE). 804 



356. Diagram Illustrating the Decomposition of White Light into the Seven Colors 



of the Spectrum in Passing Through a Prism. (BECLARD) 805 



357. Wools for the Detection of Color Blindness. (OLIVER) 806 



358. Diagram Illustrating Irradiation. (STIRLING) - 808 



359. Diagram to show (1) the primary position of the right eye; (2) the eye turned 



upward and inward, and (3) downward and outward. (BALL) 808 



360. Muscles Associated in Moving the Eyeballs in the Directions Indicated by the 



Arrows. (BALL) ; 809 



361. Positions of Images in Ocular Paralyses. (BALL) 810 



362. Capsule of Tenon. (BALL, after MERKBL) 810 



363. Diagram Illustrating Binocular Vision. (BECLARD). 811 



364. Lacrimal and Meibomian Glands, the latter viewed from the posterior surface 



of the eyelids. The coniunctiva of the upper lid has been partially dis- 

 sected off, and is raised so as to show the Meibomian glands beneath. 

 (RAYMOND, after TESTUT) 812 



365. Loring's Onhthalmoscope 813 



366. Direct Oohthalmoscopy. (BALL) 814 



367. Indirect Ophthalmoscopy. (BALL) 814 



368. The McHardv Perimeter. (BROWN) , 815 



369. Diagram of the Normal Visual Field for White and Colors. (JENNINGS) 816 



370. Diagram of the Visual Tract. (BALL) 817 



371. Diagram of Right Homonymous Hemianopsia and of the sites of lesions which 



may cause it. (BALL) 818 



