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sieve into a glass vessel; let the thicker part subside by standing afew hours; pour off the thinner liquor, and dry the thicker part in agentle heat, and keep for use.Medicinally it is rather uncertain in operation, though a powerful

hydragogue cathartic in cases of dropsy and hydrothorax.Poisonous. See Elatehii and Elatine.Extractum Genistje Cacuminum. D. Extract of Broom Tops. Isprepared from the top twigs of Sparlium scoparium, or commonbroom, and is a good diuretic in doses of 5ss to 5j in form of bolus, orpill, with calomel, &c.Extractum Gentians. L. E. D. Extract of Gentian. Take ibj ofgentian root, sliced, and a gallon of boiling water; digest for 24 hours,boil down to four pints, strain while hot, and evaporate to form anextract.Medicinally it is an excellent bitter, but is chiefly used in combinationwith metallic salts, such as sulphate of iron, &c, in form of pill.Dose gr. x to 3j.Enters into Pil. Aloes Comp. L.Extractum Glycfrrhiz^:. L. D. Extract of Liquorice. Preparedby a similar process to the preceding. It is emollient and demulcent,and is used as a masticatory in catarrhs and sore throat, and is excel-lent for sheathing and soothing irritable fauces.Adulterated (at least the coarser imported sorts) with the pulp of

prunes, glue, &c. The genuine dissolves entirely in water.Enters into Pil. Opiata. E. Pil. Scilliticai. E. Trochisci Glycyrrhiza?cum Opio. E. Trochisci Glycyrrhiza Glabrae. E.Extractum H^matoxyli. L. E. D. Extract of Logwood. Is pre-pared in the same way as the preceding. It is a good astringent indoses of gr. x to 5 j in form of pill for hamiorrhage, diarrhoea, &c.Incompalibhs. See ELematoxvli Lignum.

Extractum Hellebori Nigri Radicis. E. D. Extract of BlackHellebore Root. Prepared in a similar manner to the preceding. Itis acrid, nauseous, and somewhat bitter.Medicinally it is given in doses of gr. iij to gr. x, as a diuretic andemenagogue; in doses of gr. x to 9j, as a purgative and hydra-gogue, and is thus prescribed in mania, dropsy, hydrothorax, &c. Itforms the chief basis of Backer's Pills, which see.Poisonous. See Hellebori Nigri Radix.Extractum Humuli. L. D. Extract of Hops. Take giv of hops andone gallon of water, boil down to Oiv, strain while hot, and evapo-rate to form an extract.Medicinally it is a good bitter, and has the flavour of the hop, but it isvery doubtful whether it is sedative like lupuline. It is given in

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