THE EYE. 351 



of post-mortem changes, which quickly destroy the delicate 

 fibres that ordinarily fill this space. 



Specimens for study may be made in the following way : 

 harden an eye for fourteen days in Miiller's fluid ; then open, 

 remove the lens, and preserve in alcohol. Sections may be 

 made in any direction ; they should be colored with hema- 

 toxylou and mounted in glycerine. 



To examine the epithelium under the anterior capsule, a 

 piece of capsule should be peeled off from a fresh lens and ex- 

 amined with, or without previous staining. Single lens-fibres 

 or groups of fibres may be obtained by macerating a portion 

 of lens in dilute sulphuric acid (i per cent.), or in a per 

 cent, solution of chromic acid, after which it can be easily 

 separated into its elementary parts. 



The lachrymal gland is situated under the upper and outer 

 edge of the orbital wall, resting partly in a shallow fossa of the 

 frontal bone, to which it is attached by firm bands of connec- 

 tive tissue. 



It is an acinous gland, divided into a larger upper portion 

 (glandula Galeni), some 20 mm. long, 10 wide, and 5 thick, and 

 a lower part of about half the size (glandula Monroi) ; they are 

 supplied with blood by a branch of the ophthalmic artery, and 

 with nerves from the fifth pair. 



The connective tissue which envelops the gland also ramifies 

 through its substance, dividing it into numerous small alveoli, 

 in which are the true secreting cells of the gland, and from 

 which fine ducts pass out to coalesce, and finally discharge on 

 the free surface of the conjunctiva fornicis at its upper and 

 outer part. 



The upper part of the gland is quite dense, but in the lower 

 portion the alveoli are less closely packed, and often near- 

 ly surrounded by the orbital fat. The alveoli are covered 

 by a fine membrane composed of flat cells with numerous 

 branches or processes, which spread in various directions and 

 serve to unite the cells of the investing membrane, and also the 

 different alveoli ; they form a shell which is surrounded on its 

 outer side by a distinct lymph-space, and on its inner surface 

 is lined by the secreting cells of the gland. 



If these lymph-spaces have been injected with Berlin blue, 

 and especially if the blood-vessels are injected with some other 

 color, the arrangement of the lymph-spacea can be very well 



