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air forces

(Encyclopedia)air forces, those portions of a nation's military organization employing heavier-than-air aircraft for reconnaissance, support of ground troops, aerial combat, and bombing of enemy lines of communicat...

compressed air

(Encyclopedia)compressed air, air whose volume has been decreased by the application of pressure. Air is compressed by various devices, including the simple hand pump and the reciprocating, rotary, centrifugal, and...

air

(Encyclopedia)air: see atmosphere; liquid air; ventilation. ...

Space Force, United States

(Encyclopedia)Space Force, United States (USSF), military force that forms a separate service within the U.S. Dept. of the Air Force, est. Dec. 20, 2019, by act of Congress. The head of the Space Force is the Chief...

Air Force, United States Department of the

(Encyclopedia)Air Force, United States Department of the, military department within the U.S. Dept. of Defense (see Defense, United States Department of). The Air Force traces its roots to the founding of the Aeron...

Bossier City

(Encyclopedia)Bossier City bōˈzhər [key], city (2020 pop. 62,701), Bossier parish, NW La., on the Red River, ...

Edwards, Edward

(Encyclopedia)Edwards, Edward, 1812–86, English library pioneer. As assistant from 1839 in the British Museum, he helped Sir Anthony Panizzi draw up the rules for the catalog. Edwards collected library statistics...

Edwards, Haden

(Encyclopedia)Edwards, Haden: see Fredonian Rebellion. ...

Edwards, Ninian

(Encyclopedia)Edwards, Ninian, 1775–1833, governor of Illinois, b. Maryland. A Kentucky lawyer and jurist, he was appointed (1809) governor of Illinois Territory and served in the formative years until 1818. He s...

base line

(Encyclopedia)base line: see geodesy.