174 



VETERINARY MEDICUSTE AND SURGEBY. 



eruption, but after a time becomes chronic and dry. Scales take the 

 place of the discharge. It is considered by some as hereditary. 



Treatment. — Is generally of little avail. To prevent the formation of 

 the cracks and chasms, the scales should be dressed occasionally with 

 some oily material; and when they become much thickened by accumu- 

 lation, they are to be well soaked in an alkaline solution, carefuLy 



washed off, and the raw skin thus exposed, touched with tne nitrate of 

 silver, then covered with tar, or, what is much better, Kennedy's Pinus 

 canadensis. An occasional application of the mercurial ointment is also 

 useful. 



To be administered internally. Fowler's solutions of arsenic, in doses 

 of one ounce daily, is recommended. 



