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When brown in
color it is unfit for use. Acid, Hydro-iodic, Merck.—Sp. Gr. 1.5.—47%. Deep-brown, fuming liq.—Antirheumatic, Alterative.— Uses: Rheumatism, bronchitis (acute or chronic), asthma, syphilis, obesity,
psoriasis, to eliminate mercury or arsenic from the system,
etc.— Dose: 5—10 ♏, in much sweet water.