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ferrous sulfate

(Encyclopedia)ferrous sulfate or iron (II) sulfate, chemical compound, FeSO4. It is known as the monohydrate, FeSO4·H2O; the tetrahydrate, FeSO4·4H2O; the pentahydrate, FeSO4·5H2O; and the heptahydrate, FeSO4·7...

Fe

(Encyclopedia)Fe, symbol for the element iron.

Jamshedpur

(Encyclopedia)Jamshedpur jŭmˌshĕdpo͝orˈ [key], city (1991 pop. 461,212), Jharkand state, E central India, at the confluence of the Subarnarekha and Kharkai rivers. A great iron- and steel-producing center, it ...

Bogardus, James

(Encyclopedia)Bogardus, James bōgärˈdəs [key], 1800–1874, American architect, b. Catskill, N.Y. Among the first to use cast iron in the construction of building facades, Bogardus was noted for his commercial ...

ocher

(Encyclopedia)ocher ōˈkər [key], mixture of varying proportions of iron oxide and clay, used as a pigment. It occurs naturally as yellow ocher (yellow or yellow-brown in color), the iron oxide being limonite, or...

Black Country

(Encyclopedia)Black Country, highly industrialized region, historically mostly in Staffordshire but partly in Worcestershire and Warwickshire, W central England. It includes Dudley, Rowley Regis (see Warley), Tipto...

Menominee, river, United States

(Encyclopedia)Menominee, river, 118 mi (190 km) long, formed by the union of the Brule and the Michigamme rivers above Iron Mountain, W Upper Peninsula, N Mich., and flowing SE into Green Bay at Menominee. It passe...

Hibbing

(Encyclopedia)Hibbing, city (2020 pop. 16,214), St. Louis co., NE Minn., on the Mesabi iron range 90 mi (145 km) from the Canadian border; inc. 1893. Iron mining, for...

sphalerite

(Encyclopedia)sphalerite sfălˈərīt, sfāˈ– [key], mineral composed of zinc sulfide, usually containing some iron and a little cadmium. It occurs in crystals of the isometric system but more generally in clea...

Częstochowa

(Encyclopedia)Częstochowa chĕNˌstəkôˈvə [key], city, Śląskie prov., S Poland, on the Warta River. It ...