DISEASES OT THE SKIN. 



163 



Liquor potassa 3 ij- 



Hydrocyanic acid 3 i. 



Water 1 quart. 



Pruritus of the tail is a very common form of the disease, and seems 

 to become a habit with some horses. Sometimes, however, it depends 

 upon the presence of ascarides in the rectum. The treatment con- 

 sists in giving enemas of a decoction of quassia to destroy the parasites, 

 dressing the tail with mercurial ointment, or with equal parts of paraffin 

 and fish oil, and if the disease affects the skin generally, give twice daily: 



Flowers of sulphur 3 i j. 



Arsenic .. ■. gr. ij. 



mixed with the food; and when the prurigo is a habit, the root of the tail 

 must be protected by a strong leather band, securely fastened whilst the 

 animal is in the stable. 



RINGWORM. 



Synonyms. — Herpes circinatus; Tinea tonsurans. 

 Definition. — An eruption upon the skin which assumes a circular 

 form. In herpes circinatus, the eruption is vesicular and is non-con- 



ii;!V/VHi)iV"r 



Appearance of Ringworm. 



tagious. When a hair is pulled out, the root or bulb will usually come out 

 with it. The eruption of tinea tonsurans, on the contrary, is character- 



