Online Encyclopedia


Online Encyclopedia
Originally appearing in Volume V05, Page 459 of the 1911 Encyclopedia Britannica.
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CESAR FRANCOIS CASSINI, Or CASSINI DE THURY (1714-1784), son of Jacques Cassini, was born at the observatory of Paris on the ,7th of June 1714. He succeeded to his father's official employments, continued the hereditary surveying operations, and began in 1744 the construction of a great topographical map of France. The post of director of the Paris observatory was created for his benefit in 1771, when the establishment ceased to be a dependency of the Academy of Sciences. Cassini de Thury died at Thury on the 4th of September 1784. His chief works are:—Meridienne de l'observatoire de Paris (1744), Description geometrique de la terre (1775), and Description geometrique de la France (1784). See C. Wolf, Histoire de l'observatoire de Paris, p. 287; Max. Marie, Histoire des sciences, viii. 158; J. Delambre, Histoire de l'astronomie au X VIIIM siecle, pp. 275-309; R. Wolf, Geschichte der Astronomic, p. 451; J. J. de Lalande, Bibliographic astronomique.

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