Hydrargyrum

(hi-drar' -jir-um)., Hydrargyria. Mercury. Quicksilver. Hg 200; quantivalence II, IV. The only liquid metallic element, hence the common name, quicksilver. See Elements, Table of. In medicine, the metal, its nitrate, oxids, chlorids, and iodids are the salts most commonly, the sulphid and cyanid le frequently, used. In small doses continued not too long a time it is a tonic, purgative, and alterative. In larger doses, or too long continued, it is likely to produce pytalism. In " biliousne ," mercurial purgatives have long been a favorite remedy, blue-ma , and mercurous chlorid or calomel being usually employed. In syphilis, mercuric chlorid and mercuric iodid are generally considered specific. Mercury in the form of calomel is useful in glandular inflammations. Formerly it was much used in the same form in typhoid fever and malarial fevers. The soluble salts of mercury are highly poisonous. H. ammonia tum, ammoniated mercury, " white precipitate," mercurammonium chlorid, is used externally. H. ammon i at i, Ung., " white precipitate ointment" —ammoniated mercury 10, benzoated lard 90 parts. H. benzoas, Dose, in pill, gr. H. car bolas, easily absorbed. Dose, in pill, gr H. chloridum corrosivum, (H. perchloridum, B. P.), corrosive chlorid of mercury, mercuric chlorid, " bichlorid of mercury," " corrosive sublimate." Soluble in water and alcohol; antisyphilitic. Dose gr. Very poisonous. Liq. hydrarg. per chlorid. (B. P.), contains gr. of the mercurial salt to the ounce. Dose J -ij. H. chloridum mite, (H. subchloridum, B. P. I, mild chlorid or sub chlorid of mercury, mercurous chlorid, " calomel," laxative, tonic, and antipyretic. Insoluble in water and alcohol. Dose gr. x. H. subchlor., Ung. t'B. P.), I to of benzoated lard. H.cum ammonia, Emplastrum. See Ammonium . H. cum creta, mercury with chalk, "chalk-mixture," " gray powder,' " contains mercury clarified honey, 10, prepared chalk 57, water q. s. -j gr. -x. H. cyanidum, mercuric cyanid. Soluble in water and alcohol. It is recommended, with aconite, in diphtheria. Dose gr. Poisonous. H., Emplastrum, mercurial plaster mercury 30, oleate of mercury 1.2, lead plaster q. s. et iod., Liq., Donovan's Solution. flav., Lotio, unof., 'yellow wash" for syphilitic sores corrosive sublimate gr. xviij, lime-water x. Gilbert's Syrup, unof, hydrarg. biniodid. gr. iij, pota , iodid. gr.