126 TREATMENT OF TNELAMMATION. 



The above may serve to account for the superior efficacy 

 of the 01. Cantharid.;, the 01. Nucis being the solvent 

 of its active property. 



The way to make sure of the result is to prepare the 

 blister ourselves ; and a good recipe for this purpose is the 

 following : 



Recipe for a Blister. — Take of Spanish fiies^ a quarter 

 of a pound ; bruise them in a mortar ; and then mix them 

 in a glazed pipkin with a pint of nut oil. Set the mixture 

 upon a slow fire, and watch for it boiling ; then suffer it to 

 simmer gently for the space of ten minutes, and add another 

 pint of oil; all that remains to be done, is to strain it. 

 Linseed oil should not be used for this preparation, it 

 being an irritant to the skin of the horse. There are 

 several other forms, however, in which the flies are com- 

 pounded into blisters : 



BLISTERING INFUSION. 



Take of Bruised Flies, ftss ; 

 Boiling Water, Oiijss. 

 Macerate in a covered vessel until cold ; then strain and add ftss of Spirits of 

 "Wine. 



BLISTERING OINTMENT. 



Take of Flies, finely powdered, ftss ; 

 Wax, ftss ; 

 Hog's Lard, ftiijss. 

 Melt the wax and lard over a slow fire ; and when they are dissolved, and the 

 mixture has become nearly cold, stir in the powdered flies. 



BLISTERING TINCTURES. 



If we would make a preparation similar to " Leeming's Essence," we have 

 nothing more to do than to steep for a fortnight an ounce of bruised flies in 

 eight ounces of spirits of wine or in the same quantity of distilled vinegar : then 

 strain the mixture or, if we prefer it perfectly bright, filter it through blotting 

 paper. This makes a cleanly application. An useful tincture for immediate 

 effect is made by substituting oil of turpentine for the spirits of wine. 



Other Blisters. — Cantharides require six or twelve 

 hours to produce efi^ect ; and this, in pressing cases, is a long 

 interval. We occasionally employ boiling water, with a 



