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aerogel

(Encyclopedia)aerogel, any of a group of extremely light and porous solid materials; the lightest is less than four times as dense as dry air. Aerogels are produced from certain gels (see colloid) by heating the ge...

Templewood, Samuel John Gurney Hoare, 1st Viscount

(Encyclopedia)Templewood, Samuel John Gurney Hoare, 1st Viscount, 1880–1959, British statesman. He entered parliament as a Conservative in 1910, served (1922–24, 1924–29) as secretary of state for air, and in...

Thule , town, Greenland

(Encyclopedia)Thule känäkˈ [key], town (1995 pop. 627), N Greenland, on the north side of Inglefield Gulf. The name of Thule was originally attached to the main settlement for the Thule Eskimos, founded in 1910 ...

trachea

(Encyclopedia)trachea trāˈkēə [key] or windpipe, principal tube that carries air to and from the lungs. It is about 41⁄2 in. (11.4 cm) long and about 3⁄4 in. (1.9 cm) in diameter in the adult. It extends fr...

speedometer

(Encyclopedia)speedometer, instrument that indicates speed. A cable from an automotive speedometer is attached to the rear of the transmission of an automobile; the cable turns at a rate proportional to the speed o...

Ryder, Donald P.

(Encyclopedia)Ryder, Donald P., , 1926-2021, African-American architect, b. Springfield, Oh., Univ. of Illinois (BA, 1951). Ryder was raised in Dayton, Ohio. He serve...

psychrometer

(Encyclopedia)psychrometer sīkrŏmˈĭtər [key], one of many instruments used for measuring the water vapor content or relative humidity of the atmosphere. It consists of two identical thermometers—the wet-bulb...

Chelmsford, town, United States

(Encyclopedia)Chelmsford chĕmzˈfərd, chĕlmzˈ– [key], town (2020 pop. 36,392), Middlesex co., NE Mass.; inc. 1655. Once a ...

New England Conservatory of Music

(Encyclopedia)New England Conservatory of Music, at Boston, Mass.; coeducational; est. 1867, chartered and opened 1870. It is closely associated with the Boston Symphony Orchestra and the Berkshire Music Center at ...

Lincoln, Levi

(Encyclopedia)Lincoln, Levi, 1749–1820, American public official, b. Hingham, Mass., grad. Harvard, 1772. A lawyer, he held various local offices during the American Revolution and later became a Jeffersonian pol...