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Potsdam

(Encyclopedia)Potsdam pŏtsˈdăm [key], city (1994 pop. 139,262), capital of Brandenburg, E Germany, on the Havel River, near Berlin. It is an industrial center and rail junction. Manufactures include processed fo...

Botticelli, Sandro

(Encyclopedia)Botticelli, Sandro älĕssänˈdrō dē märēäˈnō fēlēpāˈpē [key]. He was apprenticed to Fra Filippo Lippi, whose delicate coloring can be seen in such early works as the Adoration of the Kin...

map projection

(Encyclopedia)map projection, transfer of the features of the surface of the earth or another spherical body onto a flat sheet of paper. Only a globe can represent accurately the shape, orientation, and relative ar...

Erasmus

(Encyclopedia)Erasmus dĕsĭdērˈēəs [key] [Gr. Erasmus, his given name, and Lat., Desiderius=beloved; both are regarded as the equivalent of Dutch Gerard, Erasmus' father's name], 1466?–1536, Dutch humanist, ...

Oglethorpe, James Edward

(Encyclopedia)Oglethorpe, James Edward ōˈgəlthôrp [key], 1696–1785, English general and philanthropist, founder of the American colony of Georgia. He had some military experience before being elected (1722) t...

Carroll, Lewis

(Encyclopedia)Carroll, Lewis, pseud. of Charles Lutwidge Dodgson, 1832–98, English writer, mathematician, and amateur photographer, b. near Daresbury, Cheshire (now in Halton). Educated at Christ Church College, ...

syllogism

(Encyclopedia)CE5 Categorical syllogism: Venn diagram syllogism, a mode of argument that forms the core of the body of Western logical thought. Aristotle defined syllogistic logic, and his formulations were tho...

centripetal force and centrifugal force

(Encyclopedia)CE5 Centripetal and centrifugal forces: When a ball is swung in a circle at the end of a string, centripetal and centrifugal forces act as shown above. centripetal force and centrifugal force, act...

Precambrian

(Encyclopedia)Precambrian, name of a major division of geologic time (see Geologic Timescale, tablegeologic timescale, table), from c.5 billion to 570 million years ago. It is now usually divided into the Archean a...

cycle

(Encyclopedia)cycle, in astronomy, period of time required for the recurrence of some celestial event. The length of a cycle may be measured relative to the sun or to the fixed stars (see sidereal time). A frequent...