158 Materia-Medica. 



3. Lotion. — Sulphate of copper, 1 to 2 drms. ; cold 

 water, 1 pint.* 



4. Ointment. — Acetate of lead, 1 drm. ; hog's lard,t 

 1 oz. Mix. 



5. Ointment. — Sulphate of zinc, 1 drm. ; hog's lard,f 

 1 oz. Mix. 



6. Powder. — Sulphate of zinc, 2 to 4 parts ; oxide of 

 zinc, 2 parts ; Armenian bole, £ a part. Mix carefully. 

 To be dusted over the parts daily, or as required. 



7. Internal Use. — Tincture of opium, h oz. ; powdered 

 catechu, h oz. ; flour or powdered starch, 2 or 3 oz. 

 Mix rapidly with 8 or 1 2 oz. of tepid water to form a 

 drench. 



8. Powdered opium, 1 drm. ; powdered alum, 2 drms. ; 

 powdered ginger, 1 drm. ; strong tea, 1 pint. Mix for a 

 drench, allowing time for perfect solution of the alum. 



BLISTERS. 



Blisters are irritant applications which produce active 

 inflammation in the skin, with the formation of vesicles or 

 bladders. The object of their use is to determine the 

 removal of inflammatory action from some deeper- 

 seated part, on the principle of counteraction or overcoming 

 inflammation thus set up in a healthy part. It is really 

 setting up another disease as a means of curing the first. 

 Horses as a rule are peculiarly sensitive to the action of 

 blisters. A prompt action, when applied during acute 

 disease, is to be regarded as an indication that the latter 

 is being brought under control. When a blister does 

 not rise, a fatal termination may be looked for. The 

 following are some of the forms employed. 



r. Liquid Blister. — Olive oil, 1 pint ; powdered can- 

 tharides, 1 oz. Mix and heat in a water bath for two 

 hours, then stand aside. When cold add £ pint of spirits 

 of turpentine, cover up and allow to stand twenty-four 

 hours ; then strain through fine calico, and add 2 fluid 

 oz. of oil origanum. To be applied with friction, using 

 very small quantities to ensure contemporaneous absorp- 



* Label " Poison." 



f Free from salt. Vaseline is a good substitute. 



