SECT. 230.] LITERATURE OF THE EYE. 583 



views of the zonula may be obtained. Sections of the zonula, separated from 

 the vitreous body, should also be examined on their inner and outer surfaces, 

 and preparations may also be made by teasing out the component structures. 

 B >rders of folds should also be studied, particularly folds of the inner sur- 

 face, which maybe obtained by a little care in the whole extent of the zonula, 

 and at the place of its attachment to the retina. The zonula may be ob- 

 tained in connection with the hyaloid, and isolated from the retina and from 

 the cells of the ciliary process, in half-putrid eyes, and after maceration of the 

 vitreous body; such preparations arc especially adapted to show that the 

 zonule is a part of the hyaloid, as well as to exhibit the manner in which its 

 fibres appear, and are distributed. For the study of the fibres of the zonule, 

 I may also recommend chromic acid preparations, in which they become quite 

 dark and shining, almost like elastic fibres. The capsule of the lens and the 

 epithelium present no difficulties. The tubules composing the lens are, 

 when fresh, very transparent, but become extremely distinct in diluted 

 chromic acid. Sections of the lens are readily obtained from preparations 

 which have been hardened in alcohol or chromic acid, or been simply dried ; 

 and such sections can be restored to their transparency by acetic acid.— The 

 accessory organs of the eye do not require to be specially noticed ; but it may 

 be remarked with reference to the Meibomian glands, that they can be best 

 seen on cleanly dissected tarsi which have been treated with acetic acid and 

 alkalies ; and they are to be studied also on longitudinal and transverse 

 sections of preparations which have been dried. 



Literature.— Of the Eye as a Whole: Valentin, im Report., 1836 and 1837, 

 and Handm. el. Physiol, L, p. 748 ; S. Pappenheim, Gewehelehre d. Auges, Berlin, 

 18+2 ; E. Brucke, Auat. Beschreibung el, Menschlichen Augapf els, Berlin, 1847 ; 

 W. Bowman, Lectures on the Parts concerned in the Operations on the Eye, and 

 on the Structure of the Retina and Vitreous Humour, London, 1849 ; A. Han- 

 nover, Bidrag til Ojcts Anatomic, Physiologic og Pathol, Kiobenhavn, 1850 ; 

 R A.Lowic. \ones de Oculi Phys., Vratisl., 1857 ; J. A. Moll, Bijdragen 



tot de nut. der. Oogleden, Utrecht, 1857 ; Albini, in Zcitschr. d. Wieti. Aerzte, 

 1857, p. 32. — Conjunctiva : Sappey, Sur les Glanclcs des Paupiercs, in Gaz. 

 Med., 1853 ; W. Kratjse, in Zeitschrift f. rat. Med., 1854, iv., p. ^7.— Scle- 

 rotic : M. Erdl, Disq. Auat. de Oculo, i., De m. Sclerotica, Monach., 1839 ; 

 Bochdalek, in Prag.Viertelj., 1849, iv., 119. — Cornea: Kolliker, in Mittheil. 

 d. Naturf. Ges. in Zurich, 1848, No. 19 ; Rahm, ibid, 1850, No. 45 ; Luschka, 

 in Zeitsch. f rat. Med. x., p. 20, and in Str. d. ser. Haute, Tubingen, 1851 ; 

 Strube, Der normale Bun der Cornea, Diss., Wiirzb., 1851; His, in Wurzb. 

 Vtrh.ni. ; Coccius, Ueber </. Ernahr.d. Hornhaut v.d.serumf Gef., Leipz., 

 1852; Henle, in Jahrsber. fur 1852; R. Mater, in Freiburg. Ber., 1855, 

 No. 6 ; Dornbltjth, in Zeitsehr. f. rat, Med,, Ed. vii., p. 212, and Bd. viii., p. 

 156 : Henle, ibid, p. 234 ; v. Wittich. in Archie, f Pathol. Auat., ix., p. 190 ; 

 A. TVinther, Unters. iiber den Ban der Hornhaut, Giessen, 1856, and Vir- 

 chow"s Arch, x., p. 505 ; W. His, Beitr. z. norm, u.pathol. Histol. d. Cornea, 

 Basle, 18 56.— Choroid and Iris; C. Krause, in Mull. Arch., 1837, p. xxxiii ; 

 E. Beecke, in Mull. Arch., 1846; Bochdalek, Prag. Viertelj., 18 so, i. ; v. 

 Reeken, Onders. v.d. Toestel voor accommodatis, in Ned. Lancet, 1855 ; J. 

 Budge. d. Beweg.d. Iris, Braunschweig, 1855; v. Wittich, in Areh.f. 



Ophthalmologic, ii., 1, p. 125 I H. Muller, in Areh.f. Ophth. ii., 2, and iii., 1 : 

 Rodget, in Gaz. Med., 1856, 9 and 50, and Comptcs Ben his. 19th May, and 



