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chart

(Encyclopedia)chart, term referring to maps prepared for marine navigation and for air navigation. All charts show, in some convenient scale, geographic features useful to the navigator, as well as indications of d...

Davis, Sir Colin Rex

(Encyclopedia)Davis, Sir Colin Rex, 1927–2013, English conductor. Davis began his musical career as a clarinetist, and was a self-taught conductor. After serving with the Sadler's Wells Opera, he was the conducto...

Athlone

(Encyclopedia)Athlone ăthlōnˈ [key], town, Co. Westmeath, central Republic of Ireland, on the Shannon River. It is an important road and rail junction and a busy inland port, reached...

amplifier

(Encyclopedia)amplifier, device that accepts a varying input signal and produces an output signal that varies in the same way as the input but has a larger amplitude. The input signal may be a current, a voltage, a...

Oort, Jan Hendrik

(Encyclopedia)Oort, Jan Hendrik ōrt [key], 1900–1992, Dutch astronomer. He confirmed (1927) Bertil Lindblad's theory of the Milky Way galaxy's rotation. In the 1950s he and his colleagues used radio astronomical...

galena

(Encyclopedia)galena gəlēˈnə [key] or lead glance, lustrous, blue-gray mineral crystallizing usually in cubes, sometimes in octahedrons. It is the most important ore and the principal source of lead. It consist...

Mansfield, Sir Peter

(Encyclopedia)Mansfield, Sir Peter, 1933–2017, British physicist, Ph.D. Queen Mary College, London, 1962. He was a professor at the Univ. of Nottingham from 1964 to 1994. In 2003 Mansfield shared the Nobel Prize ...

Ritter, Tex

(Encyclopedia)Ritter, Tex (Woodward Maurice Ritter), 1905–74, American country singer, b. Murvaul, Tex. He moved (1930) to New York, where he performed in musicals and on the radio. Settling (1936) in California,...

Richardson, Sir Owen Willans

(Encyclopedia)Richardson, Sir Owen Willans, 1879–1959, British physicist, Ph.D. University College, London, 1904. He was a professor at Princeton from 1906 to 1913 and at King's College London from 1914 until his...

Morse code

(Encyclopedia)CE5 Morse code [for S. F. B. Morse], the arbitrary set of signals used on the telegraph (see code). It may also be used with a flash lamp for visible signaling. The international (or continental) M...