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Chrysoloras, Manuel

(Encyclopedia)Chrysoloras, Manuel krĭsəlôrˈəs [key], c.1350–1415, Greek teacher and writer, b. Constantinople. Traveling to Italy on a diplomatic mission, he became celebrated for his teaching and introduced...

Amasis II

(Encyclopedia)Amasis II, d. 525 b.c., king of ancient Egypt (569–525 b.c.), of the XXVI dynasty. In a military revolt he dethroned Apries. He erected temples and other buildings at Memphis and Saïs and encourage...

Kanaris, Constantine

(Encyclopedia)Kanaris, Constantine känäˈrĭs [key], 1790–1877, Greek patriot, admiral, and politician. He distinguished himself in the Greek War of Independence, notably at Tenedos, where he destroyed (1822) t...

Alypius

(Encyclopedia)Alypius or Alypios both: əlĭpˈēəs [key], fl. c.360, Greek author of Introduction to Music, chief source of modern knowledge of Greek musical notation. ...

Hexapla

(Encyclopedia)Hexapla hĕkˈsəplə [key] [Gr.,=sixfold], polyglot edition of the Hebrew Bible prepared by Origen (c.185–c.255). It was mainly in six columns—a Hebrew text (probably the Masoretic), a Greek tran...

Hamilton, Sir William Rowan

(Encyclopedia)Hamilton, Sir William Rowan, 1805–65, Irish mathematician and astronomer, b. Dublin. A child prodigy, he had mastered 13 languages by the age of 13 and was still an undergraduate when he became prof...

Mitchell, Maria

(Encyclopedia)Mitchell, Maria, 1818–89, American astronomer and educator, b. Nantucket, Mass. Mitchell taught school in Nantucket, and later became a librarian. On Oct. 1, 1847, Mitchell discovered a comet (1847 ...

Mason-Dixon Line

(Encyclopedia)Mason-Dixon Line, boundary between Pennsylvania and Maryland (running between lat. 39°43′26.3″N and lat. 39°43′17.6″N), surveyed by the English team of Charles Mason, a mathematician and ast...

Lemonnier, Pierre Charles

(Encyclopedia)Lemonnier, Pierre Charles pyĕr shärl ləmônyāˈ [key], 1715–99, French astronomer. For many years he was professor of physics at the Collège de France. He studied the moon and the influence of ...

Lalande, Joseph Jérôme Lefrançais de

(Encyclopedia)Lalande, Joseph Jérôme Lefrançais de läläNdˈ [key], 1732–1807, French astronomer. Under the direction of the French Academy of Science, he went to Berlin in 1751 to make observations on the p...