Summary

D. de Quelus,  The Natural History of Chocolate…

“ The Wonderful Plaister for the Curing of all sorts of Ulcers.
Take Oil-Olive a Pound, Venetian Ceruss, in Powder, half a Pound.
Put them in a Copper Pan, or a glazed Earthen one, upon a clear moderate Fire, stirring them continually with a wooden Spatula till the Mixture is become black, and almost of the Consistence of a Plaister, (which you may know by letting fall two or three Drops upon a Pewter Plate; for if they grow cold immediately, and do not stick to the Fingers, when touch'd, it is done enough.)
”
Source: Wikisource

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