f

162 Preparations ot

Mix them in a glafs veflel; and, the foltf-tion of the Quickfilver being completed, ftrainit through paper> then evaporate it tili apel-licle appears, and fet it afide to cryftallize.

Keep the cryflals in a veffel clofe ftopt.

R E M Ä R K.

This is faidto form the bafis of Key/er's pills, andgiven, in venereal cafes, like Calomel, in dofes ofa few grains,

HYDRARGYRUS CALCINATUS.

Calcined Quicktsilver.

Take of purified Quickfilver öne pound.

Expofe the Quickfilver, in a flat-bottomed!glafs cucurbit, to an heat of about 600 de-Krees in a fand-bath, tili it becomes a red pow-der.

HYDRARGYRUS CUM GRETA,

QuiCKSILVER WITH CHALK.Take of purified Quickfilver, by weighty

three ounces.

Powdered