324 MELANOTIC TUMORS. 



If the abscess is soft and pointing, it should be opened, and a 

 solution of zinc, two drachms to a quart of water, injected 

 into the opening once or twice a day. A saturated solution 

 of corrosive sublimate is sometimes used advantageously; 

 though the zinc is much safer in the hands of inexperienced 

 persons. The nux vomica, in half-drachm doses, is also used 

 as an internal remedy with good effect. 



FISTULA OF THE WITHEBS. 



This is precisely the same as poll evil, its location alone 

 giving it a different name, and requires the same course of 

 treatment. Its location is upon the raised part along the 

 back, and over the shoulders, known as the withers, and it is 

 caused by bruises from the forepart of the saddle, and other 

 causes. 



MELAITOTIO TUMORS. 



Swellings are generally termed tumors ; but tumors proper 

 are swellings in any part of the animal not attended by in- 

 flammation, comprehending bony, fatty, fibrous, melanotic, 

 etc. For their removal an operation is generally requisite, 

 which should be left to the veterinary surgeon. Melanotic, 

 or black tumors are, however, peculiar to gray horses, and 

 operations upon this class would be of little use, as the entire 

 system is usually filled with them ; where one is seen, many 

 more may be suspected. The author presented to the Bostoq 

 Yeterinary Institute, some years ago, a large cluster, fifty op 

 sixty in number, taken from the abdominal cavity of a gray 

 liorse, all united together by membranous attachments; and 



