=Lappa (Lappa), Lappa, N.F.= (Burdock Root). ACTION AND USES: Obsolete "alterative," used in nostrums. DOSAGE: 2 Gm. or 30 grains (N.F.). _Fluidextractum Lappae (Fldext. Lapp.), Fluidextract of Lappa, N.F._--Lappa (100%). Absolute alcohol content about 40 per cent. DOSAGE: 2 Cc. or 30 minims (N.F.). =Leptandra (Leptand.), Leptandra, N.F.= (Culver's Root).--Rhizome and roots. ACTION AND USES: Unreliable cathartic; without advantage over resin of podophyllum. DOSAGE: 1 Gm. or 15 grains (N.F.). _Extractum Leptandrae (Ext. Leptand.), Extract of Leptandra, N.F._ (Powdered Extract of Leptandra).--A hydroalcoholic extract, diluted with starch. One Gm. represents 4 Gm. leptandra. DOSAGE: 0.25 Gm. or 4 grains (N.F.). _Fluidextractum Leptandrae (Fldext. Leptand.), Fluidextract of Leptandra, N.F._--Leptandra (100%). Absolute alcohol content about 40 per cent. DOSAGE: 1 Cc. or 15 minims (N.F.). =Limonis Cortex (Limon. Cort.), Lemon Peel, U.S.P.= ACTION AND USES: Used for the preparation of lemon flavors. _Tinctura Limonis Corticis (Tr. Limon. Cort.), Tincture of Lemon Peel, U.S.P._--Fresh lemon peel (50%) treated with alcohol. Absolute alcohol content about 83 per cent. =LINIMENTA, LINIMENTS.=--Liquid preparations intended for external application. For the various official liniments, see under the names of the respective chief ingredients. =*Linum (Linum), Linseed, U.S.P.= (Flaxseed).--Used in demulcent infusions, also when crushed or ground in poultices. If employed where the skin is broken the entire poultice should be sterilized by boiling before it is applied, in order to avoid infection. =LIQUORES, SOLUTIONS.=--Aqueous liquid preparations in which one or more substances are completely dissolved. For the various official solutions, see under the names of the respective principal ingredients. For Liquor Acidi Arsenosi, see under =Arseni Trioxidum=; for Liquor Antisepticus, under =Acidum Boricum=; for Liquor Antisepticus Alkalinus, under =Potassii Bicarbonas=; for Liquor Arseni et Hydrargyri Iodidi, under =Arseni Iodidum=; for Liquor Arsenicalis Clemens, under =Potassii Arsenas=; for Liquor Calcis Sulphuratae, under =Calcii Sulphidum Crudum=; for Liquor Ferri et Ammonii Acetas, under =Ammonii Acetas=; for Liquor Zinci et Alumini Compositus and Liquor Zinci et Ferri Compositus, under =Zinci Sulphas=. =Lithii Bromidum (Lith. Brom.), Lithium Bromide, U.S.P.=--LiBr (not less than 85%). White, granular, odorless, very deliquescent salt with a sharp, slightly bitter taste. Very soluble in water (1:0.6) and soluble in alcohol and in ether. ACTION AND USES: Used like other bromides, over which it has no advantage. For the supposed urate-solvent properties of lithium, see =Lithii Carbonas=. DOSAGE: 1 Gm. or 15 grains (U.S.P.).