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horse latitudes

(Encyclopedia) horse latitudes, two belts of latitude where winds are light and the weather is hot and dry. They are located mostly over the oceans, at about 30° lat. in each hemisphere, and have a…

Boeing, William Edward

(Encyclopedia) Boeing, William Edward, 1881–1956, American aviation pioneer and executive, b. Detroit. After attending Yale's Sheffield Scientific School (1899–1902), he moved (1903) to Gray's Harbor…

Whitehead, Gustave Albin

(Encyclopedia) Whitehead, Gustave Albin, 1874–1927, German inventor and airplane pioneer, b. Gustav Albin Weisskopf. He immigrated to the United States in 1893 and later Americanized his name, but…

cerium

(Encyclopedia) ceriumceriumsērˈēəm [key] [from the asteroid Ceres], metallic chemical element; symbol Ce; at. no. 58; at. wt. 140.116; m.p. 799℃; b.p. 3,426℃; sp. gr. 6.77 at 25℃; valence +3 or +4.…

wind chill

(Encyclopedia) wind chill, the cooling effect of wind and temperature combined, expressed in terms of the effect produced by a lower, windless temperature, also called wind chill factor, wind chill…

Hopkins

(Encyclopedia) Hopkins, city (2020 pop. 19,079), Hennepin co., SE Minn., a suburb of Minneapolis; inc. as West Minneapolis 1893, name changed 1928. The…

Herndon

(Encyclopedia) Herndon, town (2020 pop. 24,655), Fairfax co., N Va., inc. 1874, rechartered 1938. A suburb of Washington, D.C., Herndon has a mix of…

bone black

(Encyclopedia) bone black, solid black material, largely carbon, produced by heating animal bones to high temperatures in the absence of air so as to drive off volatile substances. Finely divided…

glider

(Encyclopedia) glider, type of aircraft resembling an airplane but having at most a small auxiliary propulsion plant and usually no means of propulsion at all. The typical modern glider has very…

tornado

(Encyclopedia) tornado, dark, funnel-shaped cloud containing violently rotating air that develops below a heavy cumulonimbus cloud mass and extends toward the earth. The funnel twists about, rises…