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fire fighting

(Encyclopedia)fire fighting, the use of strategy, personnel, and apparatus to extinguish, to confine, or to escape from fire. Ancient Rome is known to have had a fire department consisting by the 1st cent. of app...

gunboat

(Encyclopedia)gunboat, small warship for use on rivers and along coasts in places inaccessible to vessels of larger displacement. In the U.S. Civil War both sides used as gunboats, on the Mississippi and other rive...

Trevithick, Richard

(Encyclopedia)Trevithick, Richard trĕvˈĭthĭk [key], 1771–1833, British engineer and inventor, b. Cornwall. He is known as the father of locomotive power because of his invention (1800) of the high-pressure st...

feedback

(Encyclopedia)CE5 Basic feedback control system feedback, arrangement for the automatic self-regulation of an electrical, mechanical, or biological system by returning part of its output as input. A simple exam...

rocket, in aeronautics

(Encyclopedia)CE5 Relative positions of the components of the Saturn V rocket, the U.S. space vehicle used in the moon missions rocket, any vehicle propelled by ejection of the gases produced by combustion of s...

incinerator

(Encyclopedia)incinerator, furnace for burning refuse. The older and simpler kind of incinerator was a brick-lined cell with a metal grate over a lower ash pit, with one opening in the top or side for loading and a...

Douglas, cities, United States

(Encyclopedia)Douglas. 1 City (2020 pop. 16,534), Cochise co., SE Ariz., at the Mexican border; inc. 1905. The mining and smelting of copper have been ...

Oberhausen

(Encyclopedia)Oberhausen ōˈbərhouˌzən [key], city (1994 pop. 226,254), North Rhine–Westphalia, W Germany, a former industrial center of the Ruhr district. It is a port on the Rhine-Herne Canal and a rail jun...

Papin, Denis

(Encyclopedia)Papin, Denis dənēˈ päpăNˈ [key], 1647–1712?, French physicist and inventor. He was an assistant of Christian Huygens and of Robert Boyle and was professor of mathematics at the Univ. of Marbur...

Waterloo, city, United States

(Encyclopedia)Waterloo, city (1990 pop. 66,467), seat of Black Hawk co., NE Iowa, on the Cedar River; inc. 1868. Originally a center for sawmills and flour mills, Waterloo is a trade and industrial center in a farm...