THE DISEASES OF CATTLE. 227 



This disease has, occasionally, a rheumatic origin ; so that 

 if an animal be taken suddenly with inflammatory muscular 

 lameness assuming the form of rheumatism, shifting from one 

 limb to others, and then it leaves the regions of its first 

 attack and goes to the heart, I should resort to wine of 

 colchicum in the proportion of one or two drachms per day, 

 in addition to the above remedies. 



The heart is subject to various other diseases, among them 

 sarcomatous growths projecting from the au riculo -ventri- 

 cular valves: fatty, and true degeneration of the heart; cysts 

 and abcesses in the substance of the heart ; ossifications, 

 etc., etc. These and kindred diseases always terminate 

 fatally, therefore I shall not trouble the reader with any fur- 

 ther remarks on these subjects. 



• DISEASES OE THE EYE AND ITS MEMBRANES. 



DESCKIPTION OF THE EYE. 



The eyes of oxen are frequently the seat of various forms 

 of disease, hence it is necessary that the farmer should know 

 something of their wonderful mechanism ; I therefore propose 

 to give a description of the same. 



The eye is protected by a bony casing known as the orbit, 

 which appears to be much stronger than that found in the horse ; 

 in the interior part we find a large quantity of fatty matter 

 which acts as a soft cushion for the eye to repose on, and at 

 the same time as the fatty matter accumulates, it gives promi- 

 nence to the eye and increases the range of vision. 



HUMORS OF THE EYE. 



The humors of the eye are named aqueous, chrystalline, and 

 vitreous — three in number. The aqueous humor fills the in- 

 terval between the cornea and chrystalline lens, and is sur- 



