990 DISEASES AND THEIK TEEATMENT. 



a decidedly effective means of treatment. Its simplicity and safety 

 make it deserving of a trial before resorting to regular treatment. 



The following remedy is used by veterinary surgeons of my 

 acquaintance as a remedy of great value, and is kept a secret 

 The point in iising it is, to saturate a little tow with it, and j^ush 

 it to the bottom of the ulcer, so that it will touch every part of it. 

 In about twenty-four hours the diseased part can be separated 

 from the healthy flesh with the finger, from the top to the bottom, 

 and taken out, when it is to be dressed as a simple wound: — 



4 ounces accetate of copper (verdegris), 

 •i ounces sulphate of copper (blue vitriol), 

 4 ounces alum, 



1 ounce white precipitate (white mercury), 



2 ounces nitric acid, 

 1 pound honey. 



Diseases of the Eye. 



The eye, or organ of vision, is composed of three tunics, or 

 coats, and of the same number of humors. To the external coat 

 (sclerotic and cornea) it owes its form. The middle tunic is made 

 up of the choroid, or vascular coat, of the iris, or the thin curtain 

 suspended in the aqueous humor, and perforated in the center by 

 an opening called the pupil, or pupillary opening, which in the 

 horse is of an elliptical form ; in man it is round. The inner coat 

 is called the retina, or nervous covering, and is the terminal ex- 

 pansion of the optic nerve. 



The humors are three in number, and they serve as reflectors 

 of the light. They are : The aqueous humor, crystalline lens, and 

 vitreous humor. The last is the largest, and occupies about 

 four-fifths of the whole interior of the globe or eyeball. The ap- 

 pendages of the eye are the eyelids, eyelashes, and the membrana 

 nictitans, generally called the haw, which is situated in the inner 

 or lower angle of the eye. It is connected with the difierent mus- 

 cles of the eyeball. By the contraction of the straight muscle of 

 the eye, the haw is forced outward, and is one of the beautiful 

 arrangements that nature has provided for the protection of so 

 delicate and sensitive an organ. The eye is wholly covered by a 

 thin membrane called the conjunctiva. 



