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cold frame

(Encyclopedia)cold frame, in horticulture, sun-heated board frame covered with a removable top of glass or other transparent material and sunk into the ground. The top may be solid or slatted or screened for shade....

Iron, Ralph

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

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 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.

wrought iron

(Encyclopedia)wrought iron: see iron.

sherardized iron

(Encyclopedia)sherardized iron: see galvanizing. ...