BLISTERS. 349 



and biniodide of mercury ; tlie last two having some peculiar 

 effect in producing absorption of any diseased substance lying 

 beneath. In all cases the hair ought to be cut off as closely as 

 possible. 



A mild blister : 



25. — Powdered cantharides, 5 or 6 drachms. 



Venice turpentine, 1 ounce. 



Lard, 4 ounces. — Mix, and rub in. 



Strong blister : 



26. — Strons: mercurial ointment, 4 ounces. 



-■a 



Finely powdered eupliorbiura, 3 drachms. 

 Powdered cantharides, ^ ounce. — Mix. 



Yery quick blister : 



27. — Flour of mustard, 4 ounces. 



Spirit of turpentine, 1 ounce. 

 Strong liquor of ammonia, ^ ounce. 



Mix the mustard with water into a paste, then add the other ingredients 

 and rub in. 



For bony growths or other tumours : 



28. — Tincture of Iodine. 



Painted on every day, by means of a common painter's brush, 



or, 



29. — Biniodide of mercury, 1 to 1^ drachms. 



Lard, 1 ounce. 



Mix, and rub in a piece the size of a nutmeg every day, keeping the 

 part wet with tincture of arnica, ^ ounce, mixed with half a pint of 

 water. 



