e 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
I'astronomie au XVIII'e siecle_, pp. 275-309; R. Wolf, _Geschichte der
Astronomie_, p. 451; J.J. de Lalande, _Bibliographic astronomique_.

JACQUES DOMINIQUE CASSINI, Count (1748-1845), son of Cesar Francois
Cassini, was born at the observatory of Paris on the 30th of June 1748.
He succeeded in 1784 to the directorate of the observatory; but his
plans for its restoration and re-equipment were wrecked in 1793 by the
animosity of the National Assembly. His position having become
intolerable, he resigned on the 6th of September, and was thrown into
prison in 1794, but released after seven months. He then withdrew to
Thury, where he died, aged ninety-seven, on the 18th of October 1845. He
published in 1770 an account of a voyage to America in 1768, undertaken
as the commissary of the Academy of Sciences with a view to testing
Pierre Leroy's watches at sea. A memoir in which he described the
operations superintended by him in 1787 for connecting the observatories
of Paris and Greenwich by longitude-determinations appeared in 1791. He
visited England for the purposes of the work, and saw William Herschel
at Slough. He completed his father's map of France, which was published
by the Academy of Sciences in 1793. It served as the basis for the
_Atlas National_ (1791), showing France in departments. Count Cassini's
_Memoires pour servir a l'histoire de l'observatoire de Paris_ (1810)
embodied portions of an extensive work, the prospectus of which he had
submitted to the Academy of Sciences in 1774. The volume included his
_Eloges_ of several academicians, and the autobiography of his
great-grandfather, the first Cassini.

See J.F.S. Devic, _Histoire de la vie et des travaux de J.D. Cassini_
(1851); J. Delambre, _Histoire de l'astronomie au XVIII'e siecle_, pp.
309-313; _Phil. Mag._ 3rd series, vol. xxviii. p. 412; C. Wolf,
_Histoire de l'observatoire de Paris_ (1902), p. 234 et passim.
(A. M. C.)

CASSIODORUS (not _Cassiodorius_), the name of a Syrian family settled at
Scyllacium (Squillace) in Bruttii, where it held an influential position
in the 5th century A.D. Its most important member was FLAVIUS MAGNUS
AURELIUS CASSIODORUS SENATO