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Euclid, Greek mathematician

(Encyclopedia)Euclid yo͞oˈklĭd [key], fl. 300 b.c., Greek mathematician. Little is known of his life other than the fact that he taught at Alexandria, being associated with the school that grew up there in the l...

Australian Alps

(Encyclopedia)Australian Alps, chain of mountain ranges, SE Australia, in the state of Victoria and New South Wales, making up the southern part of the Eastern Highlands and forming the watershed between the Murray...

Lindsey, Benjamin Barr

(Encyclopedia)Lindsey, Benjamin Barr (Ben Lindsey), 1869–1943, American judge and reformer, b. Jackson, Tenn. As judge of the juvenile court of Denver from 1900 to 1927, he founded the American juvenile court sys...

liter

(Encyclopedia)liter, abbr. l, unit of volume in the metric system, defined since 1964 as equal to 0.001 cubic meters, or 1 cubic decimeter. A cube that has each of its edges equal to 10 centimeters has a volume of ...

Mineral Wells

(Encyclopedia)Mineral Wells, city (1990 pop. 14,870), Palo Pinto and Parker counties, N Tex.; inc. 1882. Aluminum products, bottled mineral water, clothing, and pharmaceuticals are produced, and there is gas proces...

Beauharnois

(Encyclopedia)Beauharnois bōhärˈnwä [key], city, S Que., Canada, on Lake St. Louis, a broadening of the St. ...

terrace

(Encyclopedia)terrace, a level field built on top of a hillslope into the floor of a deep valley to improve cultivation of crops. Terracing uses the runoff from the hill to increase soil retentiveness and arability...

Trans-Alai

(Encyclopedia)Trans-Alai trăns-älīˈ, trănz– [key], mountain range, central Asia, a part of the Pamir-Alai mountain system. The Trans-Alai extends 155 mi (249 km) W from China to form the border between Kyrgy...

vertical circle

(Encyclopedia)vertical circle, in astronomy, the great circle on the celestial sphere that passes from the observer's zenith through a given celestial body. In the altazimuth coordinate system the altitude of a bod...

Farnsworth, Philo Taylor

(Encyclopedia)Farnsworth, Philo Taylor, 1906–71, American inventor, b. Beaver, Utah, grad. Brigham Young Univ., 1925. He demonstrated (1927) a working model of a television system. His “dissector tube” (calle...