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Marler, Peter Robert

(Encyclopedia)Marler, Peter Robert, 1928–2014, British ethologist, b. Slough, England, Ph.D University College London, 1952, and Cambridge, 1954. At Cambridge he was introduced to the sonic spectrograph, an instr...

accordion

(Encyclopedia)CE5 Accordion accordion, musical instrument consisting of a rectangular bellows expanded and contracted between the hands. Buttons or keys operated by the player open valves, allowing air to enter...

Watt, James

(Encyclopedia)Watt, James, 1736–1819, Scottish inventor. While working at the Univ. of Glasgow as an instrument maker, Watt was asked to repair a model of Thomas Newcomen's steam engine. He devised improvements t...

spirit level

(Encyclopedia)spirit level, tool for determining whether a surface is horizontal. It consists essentially of a slightly bent transparent tube that is held in a frame. The tube contains some alcohol, ether, or simil...

Midas

(Encyclopedia)Midas mīˈdəs [key], in Greek mythology, king of Phrygia. Because he befriended Silenus, the oldest of the satyrs, Dionysus granted him the power to turn everything into gold by touch. But when even...

Muni, Paul

(Encyclopedia)Muni, Paul myo͞oˈnē [key], 1895–1967, American actor, b. Austria, whose original name was Muni Weisenfreund. His parents brought him to the United States in 1902 and from 1903 to 1913 toured with...

avalanche

(Encyclopedia)avalanche, rapidly descending large mass of snow, ice, soil, rock, or mixtures of these materials, sliding or falling in response to the force of gravity. Avalanches, which are natural forms of erosio...

MacCready, Paul Beattie

(Encyclopedia)MacCready, Paul Beattie, 1925–2007, American engineer and inventor known for his achievements in human-powered flight, b. New Haven, Conn., Ph.D. California Institute of Technology, 1952. In 1997 he...

kite, in aviation and recreation

(Encyclopedia)kite, in aviation, aircraft restrained by a towline and deriving its lift from the aerodynamic action of the wind flowing across it. Commonly the kite consists of a light framework upon which paper, s...

whirlpool

(Encyclopedia)whirlpool, revolving current in an ocean, river, or lake. It may be caused by the configuration of the shore, irregularities in the bottom of the body of water, the meeting of opposing currents or tid...