656

Preparations and Compositions. Part III.

I

Emflastrum hydrargyri. Lend.Plaster of Quicksilver.Take of

Purified quicksilver, three ounces;Sulphuretted oil, one fluidrachm ;Litharge plaster, one pound.Triturate the quicksilver with the sulphuretted oil until theglobules disappear ; then gradually add the Jead plastermelted, and mix the whole together.

Emi'lastrum ammoniaci cum hydrargyro. Lond. Dub.Plaster of Gum Ammoniac with Quicksilver.

Take of

Gum ammoniac, strained, one pound;Purified quicksilver, three ounces ;(Sulphuretted oil, a fluidrachm, Lond.)(Turpentine, two drachms, Dub.)

Triturate the quicksilver with the sulphuretted oil, (turpen-tine, Z>w£.) until its globules disappear ; then gradually addthe gum ammoniac, melted, and mix them.

These mercurial plasters are considered as powerful re-solvants and discutients, acting with much greater certaintyfor these intentions than any composition of vegetable sub-stances alone ; the mercury exerting itself in a considerabledegree, and being sometimes introduced into the habit in suchquantity as to affect the mouth. Syphilitic pains in the jointsand limbs, nodes, tophi, and beginning indurations, are saidto yield to them sometimes.

Unguentbm hydrargyri prjecipitati albi. Lond.Ointment of White Precipitated Quicksilver.Take of

White precipitated quicksilver, one drachm ;Prepared laid, one ounce and a half.Add the, precipitated quicksilver to the lard, melted with aslow fire, and mix.

Unguentum submuriatis hydrargyri ammoniati. Dub.

Ointment of Amnoniated Submuriate of Quicksilver.Take of

Ointment of white wax, one pound ;Ammoiriated submuriate of quicksilver, an ounce and ahalf.Make into an ointment.

i