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urinous smell, and a pungent ta'-te. When old, or not redistilled asabove directed, it is thick and dark-coloured.Soluble in water, according to Dr. A. T. Thomson {Conspectus), butinsoluble, according to Mr. Brande, who is right. Sparingly solublein alcohol.Medicinally it is stimulant, antispasmodic, and externally rubefacient.It may be given with mucilage in doses of v\_v to 1l\xij for chlorosisand spasmodic disorders. Externally as a liniment in hooping-cough,the singultus of infants, paralysis, &c.Enters into Spir. Ammonia; Succinatus. L.

Oleum Succini Oxidatum. Oxidated Oil of Amber. Into 5j of oilof amber in a glass vessel gradually drop 5"jss OI " nitric acid, stirringit with a glass rod. Let it stand 36 hours, and separate the super-natant resinous matter from the acid beneath, and wash it first withhot, and then with cold water, till it do not taste sour.Properties, similar to musk, for which it may be used.

Oleum Sulphuraxum. L. E. Sulphurated Oil. Take %ij of washedsulphur, Oj of olive oil; heat the oil in a very large iron vessel, andadd the sulphur gradually, constantly stirring, till they have united.Decomposition. The sulphur is partly united with the oil in the formof a viscid brown-coloured substance, and partly by means of theheat forms sulphuretted hydrogen.Medicinally it is acrid and stimulant, and was formerly in great reputeas a balsam for coughs and pectoral disorders; but from its irritatingproperties must have often proved injurious. The dose is TI^v to ^ssin a glass of water, and with from try to injij of oil of anise-seed ;but it is seldom used at present. Externally it is applied as a deter-gent to indolent and foul ulcers, which have an ichorous or saniousdischarge. It is also used in the composition of plasters.Enters into Emplast. Ammoniaci cum Hydrarg. L. Emplast. Hy-drargyri. L.

Oleum Tievm. See Oil of Tar.

Oleum Tartari. See Liquor Potass^e.

Oleum Tehebinthiks. See TerebinthinjE Oleum.

Oleum Thymi. See Oil of Thyme.

Oleum Tiglii. See Tiglii Oleum.

Oleum Tuberose. See Essence of Tuberose.

Oleum Viride. Green Oil, or Exeter Oil. A formerly popular, butnearly obsolete preparation, made by boiling Jiij each of the freshleaves of laurel, rue, marjoram, wormwood, and camomile, in twopints of olive oil, till the herbs are crisp, when they are to be pressedout. Mr. Gray says it is emollient!

Olkum Vitrtoli. See Acidum Sulphuripum.