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Sprague, Frank Julian

(Encyclopedia)Sprague, Frank Julian sprāg [key], 1857–1934, American electrical engineer, b. Milford, Conn., grad. Annapolis, 1878. He was an assistant to Thomas Edison in 1883 and independently created a superi...

Sunbury

(Encyclopedia)Sunbury, city (1990 pop. 11,591), seat of Northumberland co., E central Pa., on the Susquehanna River at the confluence of its north and west branches; laid out 1772, inc. 1921. It is in an agricultur...

Greenfield Village

(Encyclopedia)Greenfield Village, reproduction of an early American village, est. 1933 by Henry Ford at Dearborn, Mich., as part of the Edison Institute. A white-spired church, a town hall, an inn, a school, a cour...

Port Huron

(Encyclopedia)Port Huron hyo͝orˈən [key], city (1990 pop. 33,694), seat of St. Clair co., S Mich., a natural, deepwater port of entry at the junction of the St. Clair River with Lake Huron; inc. 1857. It is a sh...

Alva, Fernando Álvarez de Toledo, duque de

(Encyclopedia)Alva, Fernando Álvarez de Toledo, duque de: see Alba, Fernando Álvarez de Toledo, duque de. ...

infrared astronomy

(Encyclopedia)infrared astronomy, study of celestial objects by means of the infrared radiation they emit, in the wavelength range from about 1 micrometer to about 1 millimeter. All objects, from trees and building...

goldenrod

(Encyclopedia)goldenrod, any species of the large genus Solidago of the family Asteraceae (aster family), chiefly North American weedy herbs. They have small yellow flowers clustered, often in panicles, along a wan...

thermionic emission

(Encyclopedia)thermionic emission thûrmˌīŏnˈĭk [key], emission of electrons or ions by substances that are highly heated, the charged particles being called thermions. The number of thermions emitted increase...

telegraph

(Encyclopedia)telegraph, term originally applied to any device or system for distant communication by means of visible or audible signals, now commonly restricted to electrically operated devices. Attempts at long-...

Kyd, Thomas

(Encyclopedia)Kyd or Kid, Thomas, 1558–94, English dramatist, b. London. The son of a scrivener, he evidently followed his father's profession for a few years. In the 1580s he began writing plays. His literary fa...