PART III.

Ointments.

873

UNGUENTUM HYDllAR'GYRI PR/ECIPITATIALBI, ' Lond. Ointment of White Precipitate of Mercury.

" Take of white precipitate of Mercury, a drachm-, preparedLard, an ounce and a half. Add the precipitated mercury tothe lard previously melted by a gentle heat, and mix."

Unguentcm Submuuiatis Hydrargyri Ammoniati,Dub. Ointment of Ammoniated Submuriate of Mercury.

" Take of Ointment of white Wax, a ■pound ; ammoniatedsubmuriate of Mercury, an ounce and a half. Form them intoan ointment."

These ointments are stimulant and detergent. They arerecommended by Werlhoffj and some other German authors,as a remedy for itch, which may be safely used on infants;but they have been little employed in this country.

UNGUENTUM LYTTiE, * Lond. Blistering Ointment.

" Take of Blistering flies finely powdered, two ounces; dis-tilled Water, eight fluid ounces; Resin Cerate, eight ounces. Boilthe water with the blistering flies to half its quantity, and strain.Mix the cerate into the strained liquor, and evaporate it to aproper consistence.

SyTu Kantharidensalbc (O.).

UNGUENTUM INFUSI CANTHARIDIS VESICA-TORIiE, Edin. Ointment of Infusion of Blistering Flies.

" Take of Blistering flies, Resin, yellow Wax, of each, onepart ; Venice Turpentine, Hog's lard, of each, twopartsj boilingWatery four parts: Macerate the flies in the water for a night,and strain the liquor, expressing it strongly ; add the liquor tothe fat, and boil until the water be evaporated; then add thewax and the resin, and when these are melted, remove themixture from the fire ; add the Venice turpentine, and mix."

These ointments are sufficiently mild, but they do notalways succeed in keeping open a blistered surface, the pur-pose for which they are designed. Little eflicacy can be as-cribed to the blistering flies, their acrimony being nearlydestroyed by the v heat employed for the evaporation of thewater. 3

UNGUENTUM JUNIPER! SABIN/E, Edin. Oint-ment of Savine.

" Take of fresh leaves of Savine, two parts ,■ yellow Wax, onepart; Lard> four parts. Melt the wax and lard together, thenboil the leaves in the mixture, and express through a cloth."

1 Unguentum c Mercurio preecipitatoalbo, P. L. 1745. Ung. Calcis Hydrargyrialbi, P. L. 1787. a Unguentum Cantharidis, P. L. 1787.

3 Galen employed an ointment made by macerating the entire insect in meltedlard for twenty-four hours, and then straining by expression. Poerhaave proposedto boil the flies in water, then to pour oil' the liquid, and make an ointment of theboiled insects With the addition of lard.