2. (Hard e. of l., Spanish juice, S. liquorice, Glycyrrhizin, Black sugar; Extractum glycyrrhizæ simplex, E. g. durum, Succus g., S. g. spissatus, L.) This is seldom prepared by the English druggists, being principally imported in the dry state from Spain and Italy. That from Solazzi (Solazzi juice) is the most esteemed. A great deal of the foreign extract is mixed with fecula, or the pulp of plums, hence its inferior quality. It also frequently contains copper, derived from the boilers in which it is prepared. The extract prepared from the fresh root is usually preferred to the best foreign, as the latter has a less sweet and agreeable taste. Refined juice is prepared by dissolving the foreign
juice in water, filtering and evaporating. See Liquorice, and above.
Extract of Lobe′lia. Syn. Acetic extract of Indian tobacco; Extractum lobeliæ, E. l. inflatæ, L. Prep. (W. Proctor.) Lobelia seeds (bruised), 8 oz.; dilute alcohol (sp. gr. ·935), 4 pints; acetic acid, 1 fl. oz.; by maceration for 24 hours, and subsequent displacement. Expectorant and diaphoretic, in small doses; emetic and narcotic, in larger ones. It is principally used in asthma and other chest diseases.—Dose, 1⁄4 gr. to 5 gr.
Extract of Log′wood. Syn. Extractum hæmatoxyli (B. P.), E. h. Campechiani, (Ph. E.), L. Prep. 1. (B. P.) Logwood in chips, 1; boiling distilled water, 10; macerate 24 hours, boil to 5, strain, and evaporate to an extract, but not in iron vessels.
2. (Ph. L.) From cut logwood (logwood chips), as EXTRACT OF HOPS—Ph. L.
3. (Ph. E.) As the last (nearly).
4. (Ph. D. 1826 and Wholesale.) From the decoction.
Obs. The Ph. U. S. 1841 orders the wood to be rasped. The Ph. Baden directs displacement with cold water. On the large scale, this extract is prepared solely by decoction. 1 cwt. of wood yields about 20 lbs. of extract (Brande); 80 lbs. yield 14 lbs. of extract (Gray.) It is kept in two states—hard (EXTRACTUM HÆMATOXYLI DURUM) and soft (E. H. MOLLE). The dose of the first is 10 to 20 gr., dissolved in wine, or any cordial water; as an astringent, after each motion in diarrhœa; the second is often employed as a lozenge in the same disease, and is an inexpensive and agreeable remedy for simple relaxation of the bowels.
Extract of Lov′age. Syn. Extractum levistici, L. Prep. (Ph. Baden.) From lovage (Levisticum officinale), as EXTRACT OF BISTORT—P. Cod. Aromatic, stomachic, and diaphoretic.—Dose, 5 to 15 gr.
Extract of Lu′puline. Syn. Extractum lupulinæ, L. Prep. 1. From lupuline (the powder separated from hops by rubbing and sifting), by infusion in cold water, or by displacement.