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weather balloon

(Encyclopedia)weather balloon, balloon used in the measurement and evaluation of mostly upper atmospheric conditions (see atmosphere). Information may be gathered during the vertical ascent of the balloon through t...

pendulum

(Encyclopedia)pendulum, a mass, called a bob, suspended from a fixed point so that it can swing in an arc determined by its momentum and the force of gravity. The length of a pendulum is the distance from the point...

Chávez, Carlos

(Encyclopedia)Chávez, Carlos kärˈlōs shäˈvās [key], 1899–1975, Mexican composer and conductor. In 1928, Chávez established the Symphony Orchestra of Mexico, which he conducted until 1949. He was also dire...

Fiske, Bradley Allen

(Encyclopedia)Fiske, Bradley Allen fĭsk [key], 1854–1942, American naval officer and inventor, b. Lyons, N.Y., grad. Annapolis, 1874. In the U.S. navy he devoted himself to the invention of instruments for shipb...

Foucault, Jean Bernard Léon

(Encyclopedia)Foucault, Jean Bernard Léon zhäN bĕrnärˈ lāôNˈ fo͞okōˈ [key], 1819–68, French physicist. Known especially for his research on the speed of light, he determined its velocity in air and fou...

Hradec Králové

(Encyclopedia)Hradec Králové hräˈdĕts kräˈlôvā [key], Ger. Königgrätz, city, N central ...

Hess, Victor Francis

(Encyclopedia)Hess, Victor Francis, 1883–1964, American physicist, b. Austria, Ph.D. Univ. of Graz, 1906. After teaching at the universities of Graz and Innsbruck, he came to the United States in 1938 and was lat...

Andover

(Encyclopedia)Andover ănˈdōvər [key], town (2020 pop. 36,569), Essex co., NE Mass.; inc. 1646. Chiefly a textile producer in the 19th cent., Andover now makes toiletries, electronic...

Freiberg

(Encyclopedia)Freiberg frīˈbĕrkh [key], city, Saxony, E Germany. It is an industrial center and a rail j...

New York Pro Musica

(Encyclopedia)New York Pro Musica (New York Pro Musica Antiqua), vocal and instrumental ensemble, founded in New York City in 1952 by Noah Greenberg. One of the earliest groups to attempt historically correct perfo...