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Helmont, Jan Baptista van

(Encyclopedia)Helmont, Jan Baptista van yän bäptĭsˈtä vän hĕlˈmônt [key], 1577–1644, Flemish physician, chemist, and physicist. He attributed physiological changes to chemical causes, but his conclusions...

Heem, Jan Davidszoon de

(Encyclopedia)Heem, Jan Davidszoon de kōrˈnāˌlĭs [key], c.1631–1695, painted works that were often confused with his father's. ...

Heyden, Jan van der

(Encyclopedia)Heyden, Jan van der yän vän dər hīˈdən [key], 1637–1712, Dutch architectural and landscape painter. He worked chiefly in Amsterdam. His charming pictures of towns, buildings, and public square...

Goyen, Jan Josephszoon van

(Encyclopedia)Goyen, Jan Josephszoon van yän yōˈzəfsōn vän gōˈyən [key], 1596–1656, Dutch landscape painter. He studied at Leiden and Haarlem. In 1631 he settled at The Hague. His typically Dutch landsca...

Noot, Jan van der

(Encyclopedia)Noot, Jan van der yän vän dĕr nōt [key], b. 1539 or 1540, d. 1595?, Flemish poet. He wrote sonnets, odes, and other pieces in imitation of Petrarch and especially of Ronsard. ...

Van der Meer, Jan

(Encyclopedia)Van der Meer, Jan or Johannes, Dutch painter of Delft: see Vermeer, Jan. ...

microscope

(Encyclopedia)CE5 Compound microscope microscope, optical instrument used to increase the apparent size of an object. The electron microscope, which is not limited by the powers of optical lenses and light,...

Spartacus party

(Encyclopedia)Spartacus party or Spartacists, radical group of German Socialists, formed c.Mar., 1916, and led by Karl Liebknecht and Rosa Luxemburg. The name was derived from the pseudonym Spartacus used by Liebkn...

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