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doses of gr. v to 5 SS i n piUs twice or thrice a day in dyspepsia andarthritis.

Extractum HyoscYAMI. L. E. D. P. Extract of Henbane. Hyo-scyamus nigcr. Prepared in the same way as extract of hemlock. Itis nauseous, and fetid.Medicinal!:/ it is a good narcotic. Doubts, indeed, have lately beenthrown upon the narcotic effects of hyoscyamus, but the concurringtestimony of so many ages cannot be altogether wrong. It does not,like opium, produce costiveness, and on that account is valuable.The dose is gr. v to 3j, but it is usually given in a combined formwith purgatives.Poisonous. See Hyoscyami Folia.

Extractum Jaxapje. L. E. D. P. Extract of Jalap. Take ftj ofjalap root in powder, Oiv of rectified spirit, one gallon of water;digest the jalap in the spirit for four days, decant off the tincture,boil down the residuum with the water, strain the tincture and de-coction separately, evaporate the latter and distil the former till eachthickens; mix them both and evaporate to form an extract, which isdirected to be kept both in a hard and a soft state.Medicinally, this extract is similar in power, but not preferable to thepowder, in doses of gr. x to 9j. It is apt to gripe unless trituratedwith soap, or made into an emulsion with almonds, gum arable, orsugar. The resinous extract from the spirits alone is a slow buteffectual purgative in doses of gr. v to gr. x.Killers into Pulv. Seammonese Couip. L.

Extractum Jalaps Resinosum. D. Resinous Extract of Jalap. Isprepared like the extract of cascarilla, and is an irritant purgative,occasioning tormina, &c., which may in some measure be preventedby giving it along with mucilaginous emulsions.

Extractum Lactuc-33. L. Extract of Lettuce. Take Ibj of fresh coslettuce leaves, bruise them in a stone mortar with a little water,express the juice, and evaporate to form an extract. It is usuallyfound in a very mouldy or injured state in the shops, and is alsooften prepared with bad leaves, so that it is useless as a medicine.When good the dose is gr. v to 3j in nervous irritability. SeeLactucarjum.

Extractum Nucis Vomicae. D. Extract of Nux Vomica. Prepared bydigesting Jviij of rasped nux vomica in Oij, by measure, of proofspirit for three days, straining and expressing the liquor; to the re-sidue add Ojss of proof spirit, digest for three days more, strain,express, and distil the liquors to a proper consistence.Medicinally it is stimulant in doses of gr. 4 to gr.jss.

Extractum Opii. L. D. Extract of Opium. Extractum thebaicum. O.