Columbia Encyclopedia

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Mesabi

(Encyclopedia)Mesabi məsäbˈē [key], range of low hills, NE Minn., once famous for its extensive iron ore deposits. The ores were found in a belt c.110 mi (180 km) long and from 1 to 3 mi (1.6–4.8 km) wide bet...

shoring

(Encyclopedia)shoring, placing of props or braces, called shores, against or beneath a structure for support. Shoring is often used to stabilize a building when it is to undergo structural modification or repair. C...

Rigaud, Hyacinthe

(Encyclopedia)Rigaud, Hyacinthe (Hyacinthe Rigaud y Ros) ē rôs [key], 1659–1743, French portrait painter, b. Perpignan. From 1688 he became almost exclusively the official painter of the French court. His sitt...

mantis shrimp

(Encyclopedia)mantis shrimp, marine crustacean of the order Stomatopoda, characterized by a pair of enlarged appendages, called maxillipeds, that form powerful claws for seizing prey. The last two segments of each ...

Mason-Dixon Line

(Encyclopedia)Mason-Dixon Line, boundary between Pennsylvania and Maryland (running between lat. 39°43′26.3″N and lat. 39°43′17.6″N), surveyed by the English team of Charles Mason, a mathematician and ast...

Arrow, Kenneth Joseph

(Encyclopedia)Arrow, Kenneth Joseph, 1921–2017, American economist, b. New York City, grad. City College of New York (B.S. 1940), Columbia (M.A. 1941, Ph.D. 1951). He was on the faculties of the Univ. of Chicago ...

tarsier

(Encyclopedia)tarsier tärˈsēər [key], small, nocturnal, forest-dwelling prosimian primate, genus Tarsius. There are at least three species found in the Philippines, in Sumatra and Borneo, and in Sulawesi. Tarsi...

Windsor, British royal house

(Encyclopedia)Windsor wĭnˈzər [key], name of the royal house of Great Britain. The name Wettin, family name of Albert of Saxe-Coburg-Gotha, consort of Queen Victoria, as well as Saxe-Coburg-Gotha, the name of th...

ore

(Encyclopedia)ore, metal-bearing mineral mass that can be profitably mined. Nearly all rock deposits contain some metallic minerals, but in many cases the concentration of metal is too low to justify mining the ore...

multiplexing

(Encyclopedia)multiplexing, in communication, technique whereby two or more independent messages, or information-bearing signals, are carried by a single common medium, or channel. When multiplexing is performed, t...