Diseases Affecting the Skin 235 



finally the liquor potassae, shaking thoroughly to- 

 gether, so that the hniment is to a certain degree 

 emulsified. This dressing requires applying three 

 or four times a week, the bedding to be changed 

 frequently and the dog allowed plenty of exercise; 

 but all this treatment must be supplemented with 

 not only the best of hygienic conditions, but also 

 internal medication, such as the daily administration 

 of from five to ten drops of powdered solution of 

 arsenic, a drachm of which may be added to the 

 mixture recommended under the heading of the 

 treatment for eczema. The mere fact of the hair 

 beginning to be regenerated must not be accepted 

 as positive evidence that the disease is cured, its 

 recurrent nature being well known to veterinary 

 surgeons, though it would probably be more correct 

 to regard its reappearance as a continuation and 

 not recurrence of the original disease. From three 

 to twelve months is commonly requisite for the 

 eradication of this trouble. 



It may not be generally known, but folUcular 

 mange has been observed in the ox by continental 

 veterinary surgeons, and there is a possibiHty of its 

 communicabiUty from this animal to the dog. 



Ringworm 

 This is not a common complaint in the dog, al- 

 though it does occasionally become affected with it. 



