206 INOEGANIO AGENTS 



% washing them in a saturated solution of oxalic acid, or in 

 a dilute solution of hydrochloric acid. 



Potassium permanganate is a test for impure water in 

 changing color in the presence of organic matter. Two 

 ounces of a 1 per cent, solution will clarify and deodorize 

 100 gallons of stale and putrescent rain water. 



SECTION VI. 

 Hydrargyrum. 



Meecuey. Quicksilver. 



Synonym. — Mercurius vivas, argentum vivum, E.; mer- 

 cure, vif-argent, Fr.; quecksilber, G. 



Derivation. —Cinnabar, the native sulphate, is roasted or 

 distilled with lime, and condensed. 



Properties. — A shining, silver-white metal, without odor 

 or taste ; liquid at ordinary temperatures, and divisible into 

 spherical globules ; insoluble in the ordinary solvents ; boils 

 at 675° F., and is completely volatilized; spec, gr., 13.5584 

 When cooled to 38.88° F., it forms a ductile, malleable mass. 



PEKPARATIOXS CONTAINING METALLIC MEBCDRT. 



I. — Hylrargyruin cum Creta. Mercury with Chalk. (U. S. & B. P.) 

 Syni'tiym. — Gray powder. 



Mercury, 38 gm.; honey, 10 gn.; prepared chalk, 57 gm. ; water, 

 sufficient quantity to make 100 gm. (TJ. S. P.) 



Mercuric oxide becomes developed by keeping, making the powder 

 more active. 

 I Properties. — A light gray, rather damp powder, free from gritti- 



ness, without odor, and having a slightly sweetish taste. Contains 

 mercury in fine division by shaking the ingredients together. 



Dose. — Foals and calves, gr.x.-xv. (.6-1.); D., gr.i.-x. (.06-.6). 



II.—MassaJSydrargyri. Mass of Mercury. (U. S. P.) 



%jiO)iyTO.— Pilula hydrargyri, B. P.: blue mass, blue pill, pilula 

 cceruleae, E. ; pilule de mercure, Fr. ; mercurial pillen, G. 



Mercury, 33 gm.; glycyrrhiza, 5 gm.; althaea, 35 gm.; glycerin, b 

 gm. ; honey of roses, 34 gm. Contains 33 per cent, of mercury in a state 

 of fine division. (U. S. P.) 



Dose.— D., gr.i.-x. (.06-.6). 



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