See SULPHUR, Chemistry Index.

BRIMSTONE Medals, Figures, &c. may be cast in the following manner: Melt half a pound of brimstone over a gentle fire: with this mix half a pound of fine vermilion; and when you have cleared the top, take it off the fire, stir it well together, and it will dissolve like oil: then cast it into the mould, which should be first anointed with oil. When cool, the figure may be taken out; and in case it should change to a yellowish colour, you need only wipe it over with aquafortis, and it will look like the finest coral.