2 8S

Plasters.

f,

EMPLASTRUM CANTHARIDIS.

Plaster of Spanish Fly.Take of Spanifh Flies one pound.

Platter of Wax two pounds.

Prepared Hog's Lard half apound.

Having melted the plafter and lard, a littlebefore they coagulate fprinkle in the Flies, re-duced to a very fine powder.

R

M

R K.

Complaints have been often, and for a long time,juftly made of the failure of blifters,—not, perhaps,always from a defeet of the former formula. Thisand another compofition were at the fame time ap-plied by one of the Committee on himfelf: — thiswas found to anfwer perfeftly well, and with lefspain than the other. That this, however, or anyother compofition fhould conftantly fucceed, the A-pothecary muft be careful that the Flies be good,—frefti powdered,— that powder very fine, — and thatthe Plafter be neither made in too great a quantityat once, nor fpread with a fpatula too much heated.

EM-