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ionization chamber

(Encyclopedia)ionization chamber, device for the detection and measurement of ionizing radiation. It consists basically of a sealed chamber containing a gas and two electrodes between which a voltage is maintained ...

Griffin, city, United States

(Encyclopedia)Griffin, city (2020 pop. 23,478), seat of Spalding co., W central Ga., in a farm and cotton area increasingly integrated into metropolitan Atlanta's eco...

episome

(Encyclopedia)episome ĕpˈĭsōm [key], unit of genetic material composed of a series of genes that sometimes has an independent existence in a host cell and at other times is integrated into a chromosome of the c...

rheostat

(Encyclopedia)rheostat rēˈəstătˌ [key], device whose resistance to electric current depends on the position of some mechanical element or control in the device. Typically a rheostat consists of a resistance el...

Montville

(Encyclopedia)Montville, town (1990 pop. 16,673), New London co., SE Conn.; founded 1670, inc. 1786. Paper products, sheet metal, computer circuit boards, tachometers, aluminum doors and windows, and boxes are made...

Clark University

(Encyclopedia)Clark University, at Worcester, Mass.; coeducational; chartered 1887, opened as a graduate school 1889. It was the second graduate school to be formed in the United States. Its undergraduate college (...

Wisdom, John Minor

(Encyclopedia)Wisdom, John Minor, 1905–99, American jurist, b. New Orleans; grad. Tulane Univ. Law School, 1929. A Republican, long in private practice, he was named to the federal 5th Circuit Court of Appeals in...

ohmmeter

(Encyclopedia)ohmmeter ōmˈmēˌtər [key], instrument used to measure the electrical resistance of a conductor. It is usually included in a single package with a voltmeter, and often an ammeter. In normal usage, ...

stun gun

(Encyclopedia)stun gun, hand-held electronic device that produces a high-voltage pulse that can immobilize a person for several minutes with no permanent damage in most cases. It is powered by ordinary batteries, w...

Fallingwater

(Encyclopedia)Fallingwater, Bear Run, Pa., house designed by Frank Lloyd Wright. Fallingwater (1936–39) is an architectural tour de force of Wright's organic philosophy, whereby a building should be completely in...