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Julian Day calendar

(Encyclopedia) Julian Day calendar, system of astronomical dating that allows the difference between two dates to be calculated more easily than conventional civil calendars with their uneven months…

Helmont, Jan Baptista van

(Encyclopedia) Helmont, Jan Baptista vanHelmont, Jan Baptista vanyän bäptĭsˈtä vän hĕlˈmônt [key], 1577–1644, Flemish physician, chemist, and physicist. He attributed physiological changes to…

Heyden, Jan van der

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

Eyck, van

(Encyclopedia) Eyck, vanEyck, vanvăn īk [key], family of Flemish painters, the brothers Hubert van Eyck, c.1370–1426, and Jan van Eyck, c.1390–1441. Of the van Eycks' works that have survived, the…

Witt, Jan de

(Encyclopedia) Witt, Jan deWitt, Jan deyän [key], 1625–72, Dutch statesman. Like his father, Jacob de Witt, burgomaster of Dort, he became a leading opponent of the house of Orange and played a vital…

Dąbrowski, Jan Henryk

(Encyclopedia) Dąbrowski, Jan HenrykDąbrowski, Jan Henrykyän hĕnˈrĭk dôNbrôfˈskē [key], 1755–1818, Polish general. He distinguished himself in the insurrection led by Kosciusko in 1794. After its…

Slovak literature

(Encyclopedia) Slovak literature. The earliest documents written in the Slovak language date from the 15th cent. Following the Czech Hussite movement, many Czech cultural leaders emigrated to…

Wooden, John

(Encyclopedia) Wooden, John, 1910–2010, American basketball coach, b. Martinsville, Ind. He was the first athlete to be honored in the basketball Hall of Fame as both player and coach. An All-…

Oort, Jan Hendrik

(Encyclopedia) Oort, Jan HendrikOort, Jan Hendrikōrt [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…

Brand, Sir John Henry

(Encyclopedia) Brand, Sir John Henry, or Jan Hendrik BrandJan Hendrik Brandyän hĕnˈdrək bränt [key], 1823–88, South African politician, president of the Orange Free State, b. Capetown. He was called…