THE IMPROVED Atvl* OF FARRIERY. 507 



BLISTER. 



Are applications to the skin, which separate the 

 cuticle in the form of vesicles containing a serous 

 fluid. They excite increased action in the vessels 

 of the skin, by means of which this fluid is thrown 

 out. The part or neighbouring parts are somewhat 

 relieved by this discharge, but more by the inflam 

 mation and pain which are produced, and which lessen 

 the inflammation and pain previously existing in some 

 contiguous part. 



The substances used are various ; the most im- 

 portant is the meloe cantharides or Spanish fly. Eu- 

 phorbium is sometimes used. In common blistering 

 for strains, &c., where the expense of cantharides is 

 objected to, auxiliary vesicatories may be admitted, 

 among which the tincture of croton is now used. 



No. 1. Blister for General Use. 



Powdered Cantharides - - 1 pound. 



Venice Turpentine - - - 1 pound. 



Resin - - - - - 1 pound. 



Palm Oil, or Lard - - - 2 pounds. 

 Melt the three latter articles slowly together, and when 

 not too hot, graduallv mix the cantharides or flies. 



No. 2. A Powerful Blister. 



Powdered Euphorbium - - 3 ounces. 

 Oil of Vitriol - - - - 2 drachms 

 Spanish Flies - - - 1 pound. 



