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FRiEP ARATA E PLUMBO.

PREPARATIONS OF LEAD.CERUSSA ACETATA.

ACETATEt) CERUSSE.

'Tp AKE of Cerufle one pound.

Diftilled Vinegar one gallon

and an half.

Boil the Ceruffe with the vinegar untill the

vinegar is faturated; then rilter through paper;

and, after proper evaporation, fet it afide to

cryftallize.

R E M A R K.

Cerufle being liable to adukeration with whiting,,or calcareous earth, that fpecies of it, called fiakelead, Lewis fays, is to be preferred. This prepa-ration was called in the former Difpenfatory Sach.Saturni, and there directed to be made in a leadenvefTel. The Cerufle fhould be finely powdered be*fore the vinegar is poured to it, and flirred now andthen during the boiling.

Its ufe is chiefly external. Internaliy empleyed,by the cautious and fkilful, it is a moft ufeful medi«cinei—by the ignorant, a dangercus poifon. Cho-

lics,