JEAN

See also:

• CHARLES
• CHARLES (1270-1325)
• CHARLES (1421-1461)
• CHARLES (1525-1574)
• CHARLES (Fr. Charles; Span. Carlos; Ital. Carlo; Ger. Karl; derived from O.H.G. Charal,latinized as Carolus, meaning originally " man ": cf. Mod.Ger., Kerl," fellow," A.S. ceorl, Mod. Eng. " churl ")
• CHARLES (KARL EITEL ZEPHYRIN LUDWIG; in Rum. CAROL)
• CHARLES (c. 1319-1364)
• CHARLES [KARL ALEXANDER] (1712-1780)
• CHARLES, ELIZABETH (1828-1896)
• CHARLES, JACQUES ALEXANDRE CESAR (1746-1823)
• CHARLES, THOMAS (1755-1814)

CHARLES

See also:

• JEAN CHARLES BORDA (1733-1799)

BORDA (1733-1799)  , French mathematician and nautical astronomer, was born at Dax on the 4th of May 1733 . He studied at La Fleche, and at an early age obtained a commission in the cavalry . In 1756 he presented a Memoire sur le mouvement des projectiles to the Academy of Sciences, who elected him a member . He was present at the battle of Hastembeck, and soon afterwards joined the naval service . He visited the Azores and the Canary Islands, of which he constructed an admirable map . In 1782 his frigate was taken by a British squadron; he himself was carried to England, but was almost immediately released on parole and returned to France . He died at Paris on the loth of February 1799 . Borda contributed a long series of valuable memoirs to the Academy of Sciences . His researches in hydrodynamics were highly useful for marine engineering, while the reflecting and repeating circles, as improved by him, were of great service in nautical astronomy . He was associated with J . B . J .

Delambre and P . F . A . Mechain in the attempt to determine an arc of the meridian, and the greater number of the instruments employed in the task were invented by him . See J . B . Biot, " Notice sur Borda " in the Mein. de l'Acad. des Sciences, iv .