Chap. XLI. Of Liniments, fyc.

657

This is a very elegant mercurial ointment, and frequentlymade use of in the cure of obstinate cutaneous affections.

UngUENTUM OXIDI HYDRARGYR1 RUBRI. Ell.

Ointment of Bed Oxide of Quicksilver.Take of

lied oxide of quicksilver by nitrous acid, one part;Hogs lard, eight parts.

UNGUENTUM SUBNITRATIS HYDRARGYRl. Dab.

Ointment ofSubnitrate of Quicksilver.Take of

Ointment of white wax, half * pound;

Subnitrate of quicksilver, half an ounce.Make into an ointment.

B

UNGUENTUM HYDRARGYRl NITRICO-OXYDI. Lotld.

Ointment of Nitric-oxide of Quicksilver.Take of

Nitric-oxide of quicksilver, one ounce;

White wax, two ounces ;

Prepared lard, six ounces.Add the nitric-oxide, in very fine powder, to the wax and

lard, previously melted together, and mix.

The oxide should be reduced to very fine powder before itbe added to the axunge. This is an excellent stimulatingointment, often of very great service in indolent ill-condition-ed sores, when we wish to excite them to greater action. Asan eye-ointment, its effects are most remarkable, in the cureof all inflammations of the tunica conjunctiva, and more par-ticularly when there is a thickening and swelling of the innermembrane of the palpebrae. In such cases, it seems to actwith much greater certainty, if applied immediately after theeyelids have been scarified. In inflammation, accompaniedwith specks, it has a most powerful effect in removing both.It is also useful in all those ophthalmias which so frequentlyappear after small pox, measles, and eruptive diseases of thehairy scalp. It is used in the same quantity, and in the samemanner as the Unguentum nitratis hyclrargyri; and If"ic provetoo stimulating, it may be diluted with axunge. It is usefulto know that if it be mixed with any ointment containing re-sin, the red oxide is very quickly converted into the black,and the ointment gradually loses its red colour, and passesthrough olive-green to black.

2 T

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