DISEASES OF FARM ANIMALS 239 



ears, and neck of cattle, and sometimes the back 

 and hindquarters. 



A gray crust appears on the skin, and the hair 

 drops out. This keeps spreading in the form of a 

 ring until around the eyes, the side of the face, ears, 

 or neck may be covered with it. It appears in the 

 same way on the back, hips, and inside of the hind 

 legs. It does not seem to afifect the health of the 

 animal, as it is found in the well-kept as well as 

 those poorly kept. 



First remove the crusts by washing with warm 

 Avater in which one ounce of carbonate of potas- 

 sium has been put to every quart of water. A 

 brush should be used in washing the parts. Then 

 use the following: Iodine 2 teaspoonfuls and vase- 

 line 4 tablespoonfuls. Rub a little of this on with 

 a gloved hand. Repeat in three days. Or mix 

 carbolic acid i ounce with 2 ounces of alcohol and 

 apply a little of this to the parts with a feather once 

 or twice ; this last is very effective. 



ROARING. — A disease, due to the wasting of the 

 larynx; is characterized by loud, unnatural sounds 

 after any violent exertion. The disease sometimes 

 follows distemper and influenza or a local injury to 

 the throat. Once established the disease is incur- 

 able. In its early stages repeated light blisters may 

 help. A common blister can be made of a half tea- 

 spoonful of cantharides, a half teaspoonful of 

 biniodide of mercury and 4 tablespoonfuls of vase- 

 line or lard. 



ROUP. — A disease of the mucous membrane in 

 fowls. It is of the nature of an inflammation, with 

 a discharge from the eyes and nostrils usually ac- 

 companying. Damp and unsanitary quarters favor 

 the development and spread of roup. It is clearly 

 a germ disease, and, therefore, contagious. It is 



