SKIH DISEASES. 161 



Pus form : Mercurous oxide wash. Zinc or lead ace- 

 tate solutions, watery or oleaginous. Occasional dressing 

 with eucalyptol or thymol abate suppuration and itching. 

 Opium and belladonna tinctures with astringents for irri- 

 tation and pain. Attend to bowels and kidneys. Mineral 

 acids and tonics internally. Digestible, nutritive diet. 



Scales form : Soak crusts with oil till loose ; remove. 

 Stimulate skin with a dressing of 1 part oleum picis ; 4 

 parts potassium carbonate and sublimed sulphur, and 30 

 each of lard and olive oil. Leave on 2 or 3 days. Wash 

 off with soap and warm water. Wood tar oil or sulphur 

 iodide locally. Continue acid and tonic treatment, and 

 give arsenic. Hydrocyanic acid, potassium cyanide, ben- 

 zoin, chloral, chloroform, camphor, or cocaine relieve the 

 itching in all stages. A blister sometimes reestablishes 

 healthy action in chronic cases. 



For doses, see pages 13 to 29. 



Sublimed sulphur (flowers of sulphur) is prepared by 

 distilling the crude sulphur and conducting it in the state 

 of vapor into large chambers, where it condenses in a fine, 

 spherically granulated, yellow powder. 



HERPES (Creeping, Spreading), 



Is usually of two kinds. The first, peculiar to sucking 

 foals, is composed of vesicles somewhat larger than those 

 of eczema, and is found in irregular patches at the junc- 

 tion of the skin with mucous membranes. The second, 

 peculiar to adult life, is composed of pimples, vesicles, or 

 pustules irregularly distributed over the body in circular 

 patches, the hair of which soon falls off, exposing the 

 eruptions and a slightly scaly skin. There is probably a 

 parasitic form. 



The eruptions do not often break, their contents being 

 either absorbed or dried. For the first week they are 

 disposed to spread, the hair around the margins appear- 

 ing to die for want of nutrition, but reappearing when 



