. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. ort New York Board of Health, 1874-75. 14 S. A. Goldschmidt: Gas Nuisance. Report New York Board ofHealth, 1874-75. 10 Report of Noxious Vapor Commission. London. 18B8. 16 S. A. Goldschmidt: The New York Assay Office, City Record, June20, 1882; The New York Assay Office, a Memorial, ls>5. 17 Report of Playfair and De la Beche, 1846. • Angus Smith : Air and Rain. London, 1872. 19 Report of Select Committee on Noxious Vapors, 1876. 20 King/.et: The Alkali Trade.
. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. ort New York Board of Health, 1874-75. 14 S. A. Goldschmidt: Gas Nuisance. Report New York Board ofHealth, 1874-75. 10 Report of Noxious Vapor Commission. London. 18B8. 16 S. A. Goldschmidt: The New York Assay Office, City Record, June20, 1882; The New York Assay Office, a Memorial, ls>5. 17 Report of Playfair and De la Beche, 1846. • Angus Smith : Air and Rain. London, 1872. 19 Report of Select Committee on Noxious Vapors, 1876. 20 King/.et: The Alkali Trade. London, 1878. 21 Richardson: Smoke Nuisance and its Remedy; Edwards: SmokyChimneys, 22 Rapport, du Conseil dHygiene, etc., au Pept. de la Seine,rnris, 1S66. 23 Reports of Select Committee on Smoke Nuisance, 1840. 24 Report New York Board of Health, 1874-75. TRAGACANTH {Tragacantlia, U. S. Ph., Br. Ph.,Ph. G.; Uomme a&ragante, Codex Med.). A peculiar product of several species of Astragalus (Order, Legumi-nosa), consisting mostly of insoluble gum (bassorin) andproduced by the change and degeneration of the pith and. Fig. 4002.—Astragalus Gummifer Labill. (Baillon.) medullary rays of these plants. The section of the ge-nus yielding this product (sub-genus, Tragaeantha) con-sists of shrubs, often low-and much branched, with pin-nate leaves on stiff, pointed, persistent petioles whichremain on the stems as permanent thorns for several sea-sons, after the leaflets have fallen. The flowers an;small, axillary, solitary, or in groups of two or three,papilionaceous ; pods small, one-seeded, -hairy. Theyare natives of Asia Minor, Syria, Persia, etc., and evenof Southeastern Europe. Among the more important 213 REFERENCE HANDBOOK OF THE MEDICAL SCIENCES. species are : A. gummifer Labill., A. adscendens Boiss etllaunsskr., A .mierocephalus Wittd., A. kui-dic us Hoiss, etc. An examination of the stems and older branches of theseshrubs shows the medullary s
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