DISEASES OF THE HOG. 151 



the affected parts three or four times a day with a 

 lotion made by mixing half a dram of hydrocyanic 

 acid to the ounce of water. Twenty drops of crea- 

 sote to the ounce of lard rubbed on the parts once a 

 day is very useful. In chronic cases use a solution 

 of corrosive sublimate, three grains to the ounce of 

 water. If the skin is hard I have found an oint- 

 ment made by mixing one ounce of ichthyol and 

 two ounces of vaseline to be very useful. The oint- 

 ments of oxide of zinc, one to two, or iodine one to 

 eight of vaseline are also beneficial. 



PEHPHIQUS. 



This disease of the skin is characterized by blad- 

 ders, or elevations of the scarf skin varying from 

 the size of a pea to a walnut, containing a yellow- 

 ish transparent fluid and terminating in the forma- 

 tion of a scab. This disease usually occurs without 

 fever. The parts usually affected are the neck, 

 sides, back and sometimes the outsides of the legs. 

 They usually remain for three or four days, then 

 break, form a scab and heal. It occurs most fre- 

 quently in young pigs, but has appeared in adult 

 hogs. The causes of this disease are obscure. It is 

 supposed to be the result of an impaired condition 

 of the system and exposure to the hot sun. 



Treatment: Give one to two ounces of epsom 

 salts and follow this by ten grains of nitrate of 

 potass three times a day in the food. A complete 

 change of diet is sometimes all that is necessary. 

 After the blisters break and discharge their con- 



