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Arnold, Henry Harley

(Encyclopedia)Arnold, Henry Harley, 1886–1950, American general, chief of the U.S. Army Air Forces (1942–46), known as “Hap” Arnold, B. Gladwyne, Pa., grad. West Point, 1907. Assigned (1911) to the aviation...

frost

(Encyclopedia)frost or hoarfrost, ice formed by the condensation of atmospheric water vapor on a surface when the temperature of the surface is below 32℉ (0℃). In the formation of frost, a gas (water vapor) is ...

Howland Island

(Encyclopedia)Howland Island, uninhabited island (.73 sq mi/1.89 sq km), central Pacific near the equator, c.1,620 mi (2610 km) SW of Honolulu. The island was discovered by American traders and was claimed by the U...

Coningham, Sir Arthur

(Encyclopedia)Coningham, Sir Arthur kŭnˈĭng-əm [key], 1895–1948, British air marshal, b. Australia. During World War I, he served first in the New Zealand army and then joined (1916) the Royal Flying Corps, a...

Mississippi, river, United States

(Encyclopedia)Mississippi, river, principal river of the United States, c.2,350 mi (3,780 km) long, exceeded in length only by the Missouri, the chief of its numerous tributaries. The combined Missouri-Mississippi ...

ignition

(Encyclopedia)CE5 Ignition system ignition, apparatus for igniting a combustible mixture. The German engineer Nikolaus A. Otto, in his first gas engine, used flame ignition; another method was heating a metal t...

Brown, Charles Quinton, Jr.

(Encyclopedia)Brown, Charles Quinton, Jr., 1962–, American air force general, b. San Antonio, Tex., B.S Texas Tech Univ., 1984, M.S. Embry-Riddle Aeronautical Univ., 1994. An ROTC graduate, he was commissioned as...

Genoa

(Encyclopedia)Genoa jĕnˈōwə [key], Ital. Genova, city, capital of Genoa prov. and of Liguria, NW Italy,...

LeMay, Curtis Emerson

(Encyclopedia)LeMay, Curtis Emerson ləmāˈ [key], 1906–90, U.S. general, b. Columbus, Ohio. Commissioned a second lieutenant in the U.S. army air corps in 1930, he advanced through grades and in World War II co...

Trenchard, Hugh Montague Trenchard, 1st Viscount

(Encyclopedia)Trenchard, Hugh Montague Trenchard, 1st Viscount, 1873–1956, British air marshal. He entered the army in 1893 and served in the South African War. During World War I he commanded the Royal Flying Co...