Columbia Encyclopedia

(Encyclopedia) Phillips Academy, at Andover, Mass.; college preparatory boarding and day school; opened 1778, chartered 1780 by Samuel Phillips. Founded for boys, it is the oldest incorporated academy in the United ...

(Encyclopedia) Bangor băngˈgôr, bănˈ–, băngˈgər [key], city (2020 pop. 31,753), seat of Pe...

(Encyclopedia) Colorado Springs, city (2020 pop. 478,961), seat of El Paso co., central Colo., on Monument and Fountain creeks, at the foot of Pikes Peak; inc. ...

(Encyclopedia) air pollution, contamination of the air by noxious gases and minute particles of solid and liquid matter (particulates) in concentrations that endanger health. The major sources of air pollution are t...

(Encyclopedia) Pennsylvania Academy of the Fine Arts, Philadelphia, established in 1805, incorporated in 1806. It is supported by private endowment. The academy grew out of a proposal by Charles Willson Peale for an...

(Encyclopedia) Brooklyn Academy of Music, performing arts center located in the borough of Brooklyn, N.Y. and popularly known as BAM. Founded in 1859 and opened in 1861, it is the oldest such institution still in op...

(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...

(Encyclopedia) Secret Service, United States, a law enforcement division (since 2003) of the Dept. of Homeland Security. It was established in 1865 in the the Dept. of the Treasury to investigate and prevent counter...

(Encyclopedia) air traffic control, the system by which airplanes are safely routed into and out of major airports. Air traffic control in the United States is centered in a number of regional control centers that r...

(Encyclopedia) War Department, United States, federal executive department organized (1789) to administer the military establishment. It was reconstituted (1947) as the Dept. of the Army when the military administra...