Columbia Encyclopedia

(Encyclopedia) composition board, wood product produced in the form of a board or sheet, formed of cellulose fibers or particles derived from wood or other sources, and used principally as a building material. The o...

(Encyclopedia) Portage [1,] [2] pôrˈtəj; [3] pôrˈtĭj [key]. 1 Town (1990 pop. 29,060), Porter co., NW Ind., a suburb of Gary, on Lake Michigan; inc. 1959. The town, which was once surrounded by great industrie...

(Encyclopedia)  CE5 Continental drift (arrows indicate the directions of motion of the landmasses) A. Proposed reconstruction of the supercontinent Pangaea indicating the major present landmasses B. Proposed recon...

(Encyclopedia) Land, Edwin Herbert, 1909–91, American inventor and photographic pioneer. While at Harvard, Land became interested in the properties and manipulation of polarized light. He left Harvard and, in 1932...

(Encyclopedia) Orange. 1 City (1990 pop. 110,658), Orange co., S Calif.; inc. 1888. Citrus fruits and nuts are packed, processed, and shipped; rubber and plastic products, electronic components, aircraft parts, and ...

(Encyclopedia) dice [plural of die], small cubes used in games. They are usually made of ivory, bone, wood, plastic, or similar materials. The six sides are numbered by dots from 1 to 6, so placed that the sum of th...

(Encyclopedia) Archipenko, Alexander ärkhĭpĕnˈkō [key], 1887–1964, Ukrainian-American sculptor, b. Kiev. He moved to Moscow in 1906 and to Paris in 1908. There he began to adapt cubist technique to sculpture....

(Encyclopedia) Scranton, city (1990 pop. 81,805), seat of Lackawanna co., NE Pa., in a mountain region, on the Lackawanna River; settled in the 1700s, inc. 1866. Named for George W. Scranton, it is a commercial and ...

(Encyclopedia) Pasadena păsˌədēˈnə [key]. 1 City (1990 pop. 131,591), Los Angeles co., S Calif., at the base of the San Gabriel Mts.; inc. 1866. The city is a research and technological center with manufacture...

(Encyclopedia) asthenosphere ăsthēnˈəsfēr [key], region in the upper mantle of the earth's interior, characterized by low-density, semiplastic (or partially molten) rock material chemically similar to the overl...