manganese (man'gan-es). ment

It occurs in nature A chiefly metallic in elethe form of the black oxid. M. resembles cast iron in color, appearance, and physical properties, being very hard and brittle. It is used in the preparation of m. steel. Symbol Mn. Atomic weight 55. Specific gravity 8.0. black m. oxid. See m. dioxid. m. and ammonium sulphate. Ammoniomanganic alum, Mn2(S04)3(NH4)2S04 + 24H20, strongly resembling m. and pota ium sulphate. m. and pota ium sulphate. The common variety of m. alum, Mn2(SO*)3- K2SO4 + 24H2O. m. biniodid. See m. iodid. m. dioxid. A heavy black or dark brown powder, M11O2. A valuable oxidizing agent; used in amenorrhea, anemia and chlorosis. [Mangani oxidum nigrum, U. S. Ph.]. m. hypophosphite. A pink, crystalline, soluble salt of m. and hypophosphorous acid [mangani hypo phos phis, U. S. Ph.]. m. iodid. MnL + 4H2O; used in anemia and cachexia, m. monoxid. Manganous oxid, MnO. m. oxid. A compound of m. and oxygen. See m. monoxid and m. dioxid. m. peroxid. See m. dioxid. m. prot iodid. Manganous iodid. ni. protoxid. See m. monoxid. m. saccharate. A compound of m. and saccharic acid. m. salicylate. The m. salts of salicylic acid, MnCGHsOs^ + 2H2O. m. sulphate. 1. Manganous sulphate [mangani sulphas, U. S. Ph.]. MnSOi -j- 4H2O, a crystalline salt, used in rheumatism, gout, and catarrhal jaundice. 2. Manganic sulphate, Mn2(SOi)3. m. tannate. A substance obtained by mixing 4 parts of m. carbonate, 7 of tannin, and 5 of water, and evaporating to dryne over the water bath. [Lat., manganum, manganesium, manganium.j