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Itch. With the addition of Carbonate of Potass, ithas been much extoii •ed in various cutaneous affections.*

Unguentum Picis Liquid*. L.E.D. Tar Ointment. This ointmenthas been much extolled for the removal of tetter, and for the cure of tineacapitis.

Unguentum Resin.*; Nigr/E. L. olim, Ung. Basilicum] nigrum. Di-gestive stimulant.

Unguentum Sambuci. L.D. It possesses no adyantage over the simpleointment.

Unguentum S^lphuris. L.E.D. This ointment is a mechanical mix-ture of Lard and Sulphur, although it would appear that a small propor-tion of the latter exists also in a state of chemical combination. Med.Uses. A specific in the itch. Dr. Bateman proposes a combination,equally efficacious, but which has not the same disagreeable smell; viz." Take of sub-carbonate of potass, half an ounce ; rose water, one ounce:red sulphurate of mercury, one drachm ; essential oil of Bergamot, half afluid-drachm; sublimed sulphur, hog's lard, of each eleven ounces. Mixthem." Jasser's Ointment also, as altered in the Prussian Pharmaco-poeia, is an excellent application in Psora, vix. E Sulphur.- Sublim: Jij,Zinci Sulphat ■ Jij, 01: Lauri, et Axung. q, s, utfiat Unguentum.

Unguentum Sulphuris Compositum. L. More stimulating than thesimple ointment, from the addition of white hellebore ; it is however fre-quently found to excite too much irritation.

Unguentum Veratri. L.D. It is used for the cure of scabies, but isless certain than the ointment of sulphur.

Unguentum Zinci. L.E.D. Astringent and stimulant; very benefici-al in some species of ophthalmia, smeared upon the tarsi, every night.

Very efficient preparations may be also constructed by adding togetherequal weights of lard and narcotic vegetable powders, as those of Conium,Digitalis, Belladonna, &x.

The addition of a small quantity of powdered white sugar will frequent-ly prevent ointments becoming rancid.

VVJE URSI FOLIA. L.E.D. (Arbutus Uva Ursi.)

Uva Ursi, Bear-bemj, or Trailing Arbutus.

Bear's Whortle-berry, Wild Cranberry, fyc.

Qualities. Odour, slight, resembling that of hyson tea ; Taste, bit-terish, and sub-astringent. Chemical Composition. Tannin, mucilage,gallic acid, extractive, resin, and traces of lime. Solubility. Bothwater and alcohol extract its virtues. Med. Uses. The ancients em-ployed it on account of its astringency, the moderns however have exhi-bited it for various diseases, more especially for those affecting the blad-

* The Unguentum Werholfii, so long celebrated on the Continent, was a combina-tion of this kind.

t Basilicon, i. e. the Royal Ointment.

Bailey's Itch Ointment. This is a very complicated combination; containingNitre, Alum, Sulphate of Zinc, and Cinnabar, made into an ointment with Olive oiland Lard, and perfumed with the essential oils of Anise Seeds, Origanum, and Laven-der ; and coloured with Alkanet root.

The Indiana use an ointment in inveterate itch, which is said to prove very success-ful, and consists of finely powdered Coceulus Indicus mixed with a little warm Castoroil.