with mercury

The product is a silvery white liquid when a very great exce of mercury is employed, but when le mercury is used the amalgam is solid, and when the mercury and p. are brought together in suitable proportions, crystalline compounds, HgaKjj and HgK2, are formed, p. and ammonium tartrate. A substance, KNE^QHUOe, occurring as transparent prismatic crystals of pungent and saline but cooling taste, becoming opaque in the air, and easily soluble in water, p. and copper carbonate. A substance obtained by di olving recently precipitated copper carbonate in a solution of p. carbonate; used as a test, as it is reduced by glucose and milk sugar, but not by cane sugar, dextrin, or soluble starch, p. and gold cyanid. See p. aurocyanid. p. and sodium tartrate. Rochelle salts; a double salt, CiHiNaKOe + 4H2O, forming colorle , transparent, rhombic crystals, odorle , of saline taste, and quite soluble in water. It is nearly always used in solution. In small doses it is a diuretic and in larger doses a mild hydragogue cathartic. It is much used as a cathartic, p. arsenate. A compound of p. and arsenic acid. Three arsenates of p. are known: (1) normal p. arsenate, or tri pota ic arsenate, a crystalline body, K3ASO4; (2) monacid p. arsenate, or dipota ic arsenate, HK2ASO4; and (3) diacid p. arsenate, or mono pota ic arsenate, often called simply p. arseniate, H2KASO4, a body forming large crystals of acid reaction. The last mentioned is official in some continental pharmacopeias, p. arsenite. A compound formed by the action of arsenious oxid on caustic pota a in solution. It differs in composition according to the relative proportions of the ingredients, normal p. arsenite is K3ASO3, diacid p. arsenite is H2KASO3. The so-called solution of p. arsenite, "Fowler's solution," probably does not contain this salt, but only the uncombined arsenious acid. p. aurobromid. The compound AuBr3KBr + 2H20;