176 THE CANADIAN HOESB 



scales form, which are easily pulled off. At times this affec- 

 tion proves very irksome and troublesome to the horse, 

 .causing him to rub violently against his stall, or bite at the 

 parts affected with his teeth. In its simple form it appears 

 to inconvenience the animal but little, and is generally easily 

 removed. 



Treatment. — In the first place the food should be changed, 

 and a mild purgative given, as Barbadoes aloes, four to six 

 drachms ; the kidneys should be got to act freely, and for 

 that purpose the following ball may be given daily for four 

 or five days : — 



Nitrate of potass, ... 3 draclims. 



Camphor, . . ... 1 scruple. 

 Oil of juniper, . . . . 1 draolim, 

 I , 



with soft soap and linseed meal sufficient to form an ordinaiy 



sized ball. 



In inveterate cases small doses of calomel and opium 

 may be used with success. The eruptions should be 

 thoroughly cleaned with soap and water, and afterwards 

 dressed with a mild solution of the chloride of zinc, about 

 twenty grains to the pint of water. He should have regular 

 exercise and good grooming, using the wisp instead of the 

 curry-comb. Surfeit differs from mange in not being con- 

 tagious. 



MANGE 



Is another eruptive disease, and is very contagious, and is 

 caused by the repeated attacks of minute insects which 

 burrow into the skin ; these insects are called acari, and can 

 be easily seen by means of a magnifying glass. 



Causes. — In the majority of cases it is the result of con- 

 tagion, either from coming in direct contact with a mangy 

 horse, or it may be carried by means of his harness or, 

 blankets. It is also generated by nncleanliness and insuffi- 



