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Trenchard, Hugh Montague Trenchard, 1st Viscount

(Encyclopedia)Trenchard, Hugh Montague Trenchard, 1st Viscount, 1873–1956, British air marshal. He entered the army in 1893 and served in the South African War. During World War I he commanded the Royal Flying Co...

Federal Aviation Administration

(Encyclopedia)Federal Aviation Administration (FAA), component of the U.S. Department of Transportation that sets standards for the air-worthiness of all civilian aircraft, inspects and licenses them, and regulates...

Warner Robins

(Encyclopedia)Warner Robins, city (1990 pop. 43,726), Houston co., central Ga., in an agricultural region; inc. 1943. The surrounding area yields peanuts, grain, fruit, and livestock. There is diverse manufacturing...

Chelyabinsk

(Encyclopedia)Chelyabinsk chĭlyäˈbĭnsk [key], city (1989 pop. 1,142,000), capital of Chelyabinsk region, W Siberian Russia, in the southern foothills of the Urals and on the Mias River. It also lies on the Tran...

speleology

(Encyclopedia)speleology spēlēŏlˈəjē [key], systematic exploration of caves, popularly called spelunking. It includes the measuring and mapping of caves and reporting on the flora and fauna found in them. One...

humidity

(Encyclopedia)humidity, moisture content of the atmosphere, a primary element of climate. Humidity measurements include absolute humidity, the mass of water vapor per unit volume of natural air; relative humidity (...

Tedder, Arthur William Tedder, 1st Baron

(Encyclopedia)Tedder, Arthur William Tedder, 1st Baron, 1890–1967, British air marshal. He saw service in the infantry and the Royal Flying Corps in World War I. After 1919 he held important positions in the Roya...

coal mining

(Encyclopedia)coal mining, physical extraction of coal resources to yield coal; also, the business of exploring for, developing, mining, and transporting coal in any form. Coal has been historically important indus...

Sun Belt

(Encyclopedia)Sun Belt or Sunbelt, southern tier of the United States, focused on Florida, Texas, Arizona, and California, and extending as far north as Virginia. The term gained wide use in the 1970s, when the eco...

trade winds

(Encyclopedia)trade winds, movement of air toward the equator, from the NE in the Northern Hemisphere and from the SE in the Southern Hemisphere. The trade winds originate on the equatorial sides of the horse latit...