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Weelkes, Thomas

(Encyclopedia)Weelkes, Thomas, c.1575–1623, English composer. His four books of madrigals (1597–1600) mark Weelkes as one of the great English madrigalists. His music is remarkable for melodic characterization ...

Alba, Fernando Álvarez de Toledo, duque de

(Encyclopedia)Alba or Alva, Fernando Álvarez de Toledo, duque de ălˈbə, ălˈvə, Span. both: fārnänˈdō älˈvärāth dā tōlāˈᵺō do͞oˈkā dā älˈvä [key], b. 1507 or 1508, d. 1582, Spanish gener...

microphone

(Encyclopedia)microphone, device for converting sound into electrical energy, used in radio broadcasting, recording, and sound amplifying systems. Its basic component is a diaphragm that responds to the pressure or...

Colorado–Big Thompson project

(Encyclopedia)Colorado–Big Thompson project, constructed by the U.S. Bureau of Reclamation to divert water from the headstreams of the Colorado River to irrigate c.720,000 acres (291,400 hectares) of land in NE C...

Swan, Sir Joseph Wilson

(Encyclopedia)Swan, Sir Joseph Wilson, 1828–1914, English chemist and physicist. He made an incandescent lamp using a carbon filament (1860), 20 years before Edison's lamp. Noted for important contributions to ph...

García Robles, Alfonso

(Encyclopedia)García Robles, Alfonso älfônˈsō gärsēˈä rōˈblās [key], 1911–91, Mexican statesman, b. Zamora, Mex. After studying law in Europe, he entered the Mexican foreign service in 1939. He was a ...

Cherokee Strip

(Encyclopedia)Cherokee Strip or Cherokee Outlet, a narrow piece of land in N Oklahoma. Bounded on the north by the Kansas border, it has an area of more than 6 million acres (2.4 million hectares). Measuring some 5...

record player

(Encyclopedia)record player or phonograph, device for reproducing sound that has been recorded as a spiral, undulating groove on a disk. This disk is known as a phonograph record, or simply a record (see sound reco...

battery, electric

(Encyclopedia)CE5 Lead storage cell: At the lead-dioxide electrode, electrons from the circuit combine with lead dioxide and sulfuric acid to form lead sulfate and water. At the spongy-lead electrode, lead react...

learning disabilities

(Encyclopedia)learning disabilities, in education, any of various disorders involved in understanding or using spoken or written language, including difficulties in listening, thinking, talking, reading, writing, s...