Columbia Encyclopedia

Search results

393 results found

mass spectrograph

(Encyclopedia)mass spectrograph, device used to separate electrically charged particles according to their masses; a form of the instrument known as a mass spectrometer is often used to measure the masses of isotop...

Lambert, John

(Encyclopedia)Lambert, John, 1619–83, English parliamentary general. He fought in the first civil war (1642–46) and assisted Henry Ireton in drawing up the Heads of the Proposals in 1647. In 1648 he commanded t...

San Juan Boundary Dispute

(Encyclopedia)San Juan Boundary Dispute, controversy between the United States and Great Britain over the U.S.–British Columbia boundary. It is sometimes called the Northwest Boundary Dispute. The difficulty aros...

evaporimeter

(Encyclopedia)evaporimeter ĭvăpˌərĭmˈətər [key], instrument that measures the rate of evaporation of water into the atmosphere, sometimes called an atmometer. Evaporimeters are of two types, those that meas...

Kertész, André

(Encyclopedia)Kertész, André kĕrtĕshˈ [key], 1894–1985, American photographer, b. Budapest. His black-and-white modernist photographs often capture small, lyrical, and emotionally resonant moments while also...

Arecibo Observatory

(Encyclopedia)Arecibo Observatory, radio-astronomy facility located near Arecibo, Puerto Rico, part of the National Astronomy and Ionosphere Center. Conceived by, designed by, and built under the supervision of Wil...

Swabian League

(Encyclopedia)Swabian League, association of Swabian cities and other powers in SW Germany for the protection of trade and for regional peace. The Swabian League of 1488–1534 is the best known of the long series ...

slide rule

(Encyclopedia)slide rule, instrument for making numerical computations and readings, the results of which may be read easily and quickly after performing simple mechanical manipulations. Multiplication and division...

electronic music

(Encyclopedia)electronic music or electro-acoustic music, term for compositions that utilize the capacities of electronic media for creating and altering sounds. Initially, a distinction must be made between the te...

Moog, Robert Arthur

(Encyclopedia)Moog, Robert Arthur mōg [key], 1934–2005, American electronic engineer, inventor of the Moog synthesizer, b. New York City, grad. Queens College (B.S, 1957), Columbia (B.S., 1957), Cornell (Ph.D., ...