I 



DISEASES OF THE SKIN. 157 



salt and water. If the part continues indolent and is likely to suppurate, 

 the injury is beyond what is usually called a warble, and must be treated 

 according to its nature and degree, as a contused wound, by application 

 of 



Biniodide of mercury 1 part 



Lard 16 parts 



or the continued application of poultices: 



Lineeed meal, 



Sweet O-l, 



Boiling water aa sufficient. 



Mix the meal with the water and then stir in the oil. 



Troublesome fluctuating warbles sometimes require to be laid open 

 through the centre from end to end. The interior should then be in- 

 jected with a weak solution of carbolic acid, say: 



Carbolic acid 1 part 



Water * 50 parts 



and cold-water dressings with one per cent of carbolic acid may afterward 

 be applied to the part until healed. 



Sit PASTS. 



When a swelling such as just described, either by neglect or by re- 

 peated recurrence of the cause, has become hard and insensible, and the 

 skin is permanently injured, it is no longer termed a warble, but is known 

 as a sitfast, because of the difi&culty of removing it. The skin becomes 

 thickened and half dead, and is often adherent to the bottom of the sore 

 and kept alive by blood at its root. The sitfast will frequently be found 

 to be partially separated all round from the living skin. 



The best treatment is to cut it out. Cut the tissue and remove every 

 particle of the hard horny skin, after which it may be carefully touched 

 with nitrate of silver, to remove any of the disorganized part which has 

 been left by the knife. 



