A companion to the United States pharmacopia; . , and with the scars of stems and rootlets ; externally darkgrayish-brown ; internally light brownish-red ; bark thick ; wood bun- UNITED STATES PHARMACOPOEIA. 999 dies small; pith about the same thickness as the bark ; inodorous ; tasteastringent. Constituents.—About twenty-five per cent, tannin, etc. Medicinal Uses.—Powerfully astringent. Dose.—One to two grams (15 to 30 grains). TOKME^TILL^E EXTRACTUM FLUIDUM. Fluid Extract of Tormentilla. To make five hundred cubic centimeters (or its equivalent—17 U. ), use five hundred grams (o
A companion to the United States pharmacopia; . , and with the scars of stems and rootlets ; externally darkgrayish-brown ; internally light brownish-red ; bark thick ; wood bun- UNITED STATES PHARMACOPOEIA. 999 dies small; pith about the same thickness as the bark ; inodorous ; tasteastringent. Constituents.—About twenty-five per cent, tannin, etc. Medicinal Uses.—Powerfully astringent. Dose.—One to two grams (15 to 30 grains). TOKME^TILL^E EXTRACTUM FLUIDUM. Fluid Extract of Tormentilla. To make five hundred cubic centimeters (or its equivalent—17 U. ), use five hundred grams (or its equivalent—17f avoirdupoisounces) of the drug, in No. 30 powder. As a menstruum use diluted alcohol. Dose.—One to two cubic centimeters (15 to 30 minims). Toxicodendron. See Rhus Toxicodendron. Tragacantha; XL S. Tragacanth. Traganth, G. ; Gomme adragante, F. ; Tragacanto, Gomo Traga-canto, Alquitira, Sp.; Dragant, Sw.; Gum Tragacanth. Origin.—Astragalus gwnmifer, Lobillardiere, and other species ofAstragalus (Leguminosaz).. Fig. 536.—Flake Tragacanth, natural size. Habitat.—Western Asia. Description.—A gum or gum-like exudation from incisions madeinto the stem. (See the Pharmacopoeia, page 358.) The pharmaco- 1000 A COMPANION TO THE poeial description states that the fluid portion of tragacanth mucilageis not precipitated by alcohol. This is an inadvertent error ; the word not should be omitted. Varieties.—Ribbon or flake tragacanth consists of clean,white bands, or spirals, as seen in the figure. Tragacanth in sorts is more or less discolored, and consists ofirregular pieces. Constituents.—Rather more than one-half of the gum is insolublein cold water, and consists of tragacanthin (also sometimes calledbassorin) ; about one-third of the gum is soluble in water, and consistsof a calcium salt of gummic acid (not the same as the calcium salt ofArabic acid, which constitutes acacia). Used as a mucilaginous excipient. TRAGACAISTTILE MUCILAGO; U.
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