NORMAL HISTOLOGY. 



both of the vascular layers at once. They are stained 

 double and mounted in glycerin or balsam. 



Cornea and Sclera. A fresh eye from the rabbit or dog 

 is hardened in Muller's fluid and alcohol. The cornea 

 should now be excised close to the sclero-corneal junc- 

 tion, imbedded in celloidin, and thin sections made per- 

 pendicular to the surface, including the entire thickness. 

 They may be stained double and mounted in glycerin. 



A transverse section may be made from a bit of the 

 sclera from the same eye ; stained double and mounted 

 in balsam. 



Sclero-Corneal Junction, and Iris. -The cornea and 

 sclera, in their relation to one another, and the ciliary 

 bodies, and iris, may be examined in a specimen pre- 

 pared as follows : An eye that of the pig is best, if a 

 fresh human eye cannot be procured is placed, after 

 making a short incision in the sclera, in Muller's fluid, 

 where it remains for two weeks, the fluid being changed 

 once or twice ; it is then soaked for an hour or two in 

 water, and the hardening completed in dilute and strong 

 alcohol. A bit is excised, including the sclero-corneal 

 junction and adjacent parts, and imbedded in celloidin. 



Lens Fibres by Teasing. A short incision is made 

 through the sclera of a fresh eye, which is soaked for 

 three or four days in a mixture of alcohol and water, i to 

 2. The lens will be found on removal to be white and 

 soft, and readily breaks up into layers ; a bit of one of 

 these is teased on a slide in eosin-glycerin and mounted 

 in the same. 



Sections of the Lens. The eye of a rabbit or pig should 

 be kept for a fortnight in Muller's fluid ; the lens is then 



