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Iron Age

(Encyclopedia)Iron Age, period in the development of industry that begins with the general use of iron and continues into modern times. In Asia, Egypt, and Europe it was preceded by the Bronze Age. It did not begin...

iron

(Encyclopedia)iron, metallic chemical element; symbol Fe [Lat. ferrum]; at. no. 26; at. wt. 55.845; m.p. about 1,535℃; b.p. about 2,750℃; sp. gr. 7.87 at 20℃; valence +2, +3, +4, or +6. Iron is biologically s...

Bronze Age

(Encyclopedia)Bronze Age, period in the development of technology when metals were first used regularly in the manufacture of tools and weapons. Pure copper and bronze, an alloy of copper and tin, were used indiscr...

Gilded Age

(Encyclopedia)Gilded Age, a term used to describe a period in United States history—from roughly 1870 to 1900—when the wealthy elite consisted of industrialists w...

Iron, Ralph

(Encyclopedia)Iron, Ralph: see Schreiner, Olive. ...

Iron Cross

(Encyclopedia)Iron Cross: see decorations, civil and military. ...

Iron Gate

(Encyclopedia)Iron Gate, Rom. Porţile de Fier, Serbian Gvozdena Vrata, gorge of the Danube River, c.2 mi (3.2 km) long and c.550 ft (170 m) wide, on the Serbia-Romania border between Orşova and Drobeta-Turnu Seve...

Iron Guard

(Encyclopedia)Iron Guard, Romanian nationalistic, anti-Semitic, and antiparliamentary group, founded in 1924 by Corneliu Zelea Codreanu. Originally named the Legion of the Archangel Michael, it was organized on mil...

iron lung

(Encyclopedia)iron lung, device used to maintain artificial respiration over an extended period of time. Before the successful vaccination program against poliomyelitis, it was used mostly in treatment of that dise...

iron pyrites

(Encyclopedia)iron pyrites: see pyrite.