converted steel
41Medway watermills (upper tributaries) — For an explanation of the various pieces of machinery mentioned, see Mill machinery. River Medway (Upper tributaries) Legend …
42chemical industry — Introduction complex of processes, operations, and organizations engaged in the manufacture of chemicals and their derivatives. Although the chemical industry may be described simply as the industry that uses chemistry and… …
43Ironclad warship — An ironclad was a steam propelled warship of the later 19th century, protected by iron or steel armor plates. [Hill, Richard. War at Sea in the Ironclad Age ISBN 0 304 35273 X; p.17] The ironclad was developed as a result of the vulnerability of… …
44Avro Vulcan — Infobox Aircraft name= Avro Vulcan caption= A Vulcan B.2 of the RAF type= Strategic bomber national origin = United Kingdom manufacturer= Avro designer= first flight= 30 August 1952 introduction= 1956 retired= March 1984 status= primary user=… …
45Third rail — For other uses, see Third rail (disambiguation). Third rail at the West Falls Church Metro station near Washington, D.C., electrified at 750 volts. The third rail is at the top of the image, with a white canopy above it. The two lower rails… …
46Spring Street Financial District — Infobox nrhp | name =Spring Street Financial District nrhp type = hd caption = Spring Street looking north from Hotel Hayward location= 354–704 S. Spring St., Los Angeles, California lat degrees = 34 lat minutes = 2 lat seconds = 48 lat direction …
47Chicago 'L' rolling stock — The rolling stock of the Chicago L rapid transit system consists of 1,190 rail cars (all permanently coupled into 595 married pairs) dating from 1969 to 1994, delivered in four series: the 2200 series, 2400 series, 2600 series, and 3200 series,… …
48Freight railways in Melbourne — Line details Stations None Tracks Both broad, standard and dual gauge …
49Spain — /spayn/, n. a kingdom in SW Europe. Including the Balearic and Canary islands, 39,244,195; 194,988 sq. mi. (505,019 sq. km). Cap.: Madrid. Spanish, España. * * * Spain Introduction Spain Background: Spain s powerful world empire of the 16th and… …
50United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
