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Keppel, Arnold Joost van

(Encyclopedia)Keppel, Arnold Joost van: see Albemarle, Arnold Joost van Keppel, 1st earl of. ...

Van Vleck, John Hasbrouck

(Encyclopedia)Van Vleck, John Hasbrouck, 1899–1980, American physicist, b. Middletown, Conn., Ph.D. Harvard, 1922. As a professor at Harvard, Van Vleck developed fundamental theories on the quantum mechanics of m...

Helst, Bartholomeus van der

(Encyclopedia)Helst, Bartholomeus van der bärˌtōlōmāˈəs vän dər hĕlst [key], 1613–70, Dutch portrait painter. In Amsterdam the wealthy citizens preferred his flattering, tasteful portraits to those of R...

Wynants, Jan

(Encyclopedia)Wynants or Wijnants, Jan both: yän vīˈnänts [key], c.1625–84, Dutch landscape painter. A follower of Ruisdael, he worked chiefly in Haarlem. The little figures in his paintings are the work of o...

Oldenbarneveldt, Johan van

(Encyclopedia)Oldenbarneveldt, Johan van yōhänˈ vän ôlˌdənbärˈnəvĕlt [key], 1547–1619, Dutch statesman. He aided William the Silent in the struggle for Dutch independence from Spain and opposed the dic...

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