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Welsbach mantle

(Encyclopedia)Welsbach mantle or Welsbach burner [for C. A. von Welsbach], cylindrical framework of gauze impregnated with oxides of thorium and cerium. When heated in a gas flame, it produces a very bright light b...

North Yorkshire

(Encyclopedia)North Yorkshire, county (2011 pop. 598,376), 3,209 sq mi (8,313 sq km), N England. The county comprises the districts of Craven, Hambleton, Harrogate, Richmondshire, Ryedale, Scarborough, and Selby. Y...

São João de Meriti

(Encyclopedia)São João de Meriti souN zhwouN ᵺĭ mərēˈtĭ, də mĭrētēˈ [key], city (1990 est. pop. 508,200), Rio de Janeiro state, SE Brazil, a residential suburb northwest of the city of Rio de Janeiro....

East Rockaway

(Encyclopedia)East Rockaway, village (2020 pop. 10,159), Nassau co., SE N.Y., on SW Long Island; settled c.1688, inc. 1900. It is mostly residential with some light m...

Elmont

(Encyclopedia)Elmont, uninc. city (2020 pop. 35,265), Nassau co., SE N. Y., on Long Island. A diverse residential suburb, Elmont has some light industry. Belmont Park...

Ashkin, Arthur

(Encyclopedia)Ashkin, Arthur, 1922–2020, American physicist, b. Brooklyn, N.Y., Ph.D. Cornell, 1952. Ashkin worked for four decades at Bell Laboratories, retiring in 1992. Ashkin researched microwaves, nonlinear ...

Hopper, DeWolf

(Encyclopedia)Hopper, DeWolf, 1858–1935, American singer and comedian, b. New York City. He made his debut in 1879 and thereafter became popular in musical comedy and light opera. He is best remembered for his re...

Clarksdale

(Encyclopedia)Clarksdale, city (2020 pop. 14,903), seat of Coahoma co., NW Miss., on the Sunflower River; inc. 1882. It is a processing and distribution center for ag...

Hertford

(Encyclopedia)Hertford, town, E central England, on the Lea River. Hertford is an agricultural market with light industries, including brewing, flour milling, and the...

Farnsworth, Philo Taylor

(Encyclopedia)Farnsworth, Philo Taylor, 1906–71, American inventor, b. Beaver, Utah, grad. Brigham Young Univ., 1925. He demonstrated (1927) a working model of a television system. His “dissector tube” (calle...