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Goddard, Robert Hutchings

(Encyclopedia)Goddard, Robert Hutchings, 1882–1945, American physicist and rocket expert, b. Worcester, Mass., grad. Worcester Polytechnic Institute (B.S., 1908), Ph.D. Clark Univ., 1911. From 1914 he was associa...

Trippe, Juan Terry

(Encyclopedia)Trippe, Juan Terry trĭp [key], 1899–1981, pioneering American aviation executive, b. Sea Bright, N.J. A U.S. Navy pilot (1917–18), he graduated (1921) from Yale, and worked briefly on Wall Street...

air-cushion vehicle

(Encyclopedia)CE5 Air-cushion vehicle: In vehicles modified with a trunk or skirt (A), the rate of leakage is reduced and less power is needed to maintain the cushion. Vehicles designed to travel over deep water...

Lynn

(Encyclopedia)Lynn, city (1990 pop. 81,245), Essex co., E Mass.; inc. as a town 1631, as a city 1850. Lynn is an old industrial center. The first ironworks (1643) and the first fire engine (1654) in the country wer...

Geysir

(Encyclopedia)Geysir gāˈsĭr [key], hot spring, SW Iceland, c.75 mi (120 km) W of Reykjavík. Although in medieval times it erupted three times daily, weeks now elapse between eruptions. The height and temperatur...

kerosene

(Encyclopedia)kerosene or kerosine, colorless, thin mineral oil whose density is between 0.75 and 0.85 grams per cubic centimeter. A mixture of hydrocarbons, it is commonly obtained in the fractional distillation o...

Johnson, John Harold

(Encyclopedia)Johnson, John Harold, 1918–2005, African-American magazine publisher, b. Arkansas City, Ark. The son of a mill worker, he began his career editing a Chicago insurance company magazine. In 1942 he st...

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 ...

taconite

(Encyclopedia)taconite, low-grade iron ore, a flintlike rock usually containing less than 30% iron. Resistant to drilling and to the extraction of its contained metal, the rock was long considered worthless. Experi...

Thomasville

(Encyclopedia)Thomasville. 1 City (1990 pop. 17,457), seat of Thomas co., SW Ga., near the Fla. line; inc. 1831. It is a farm trade center, with a large fresh-vegetable market. Manufactures include lumber, clothing...