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DELAMBRE; one of the most distinguished astronomers of our time, born at Amiens, in 1749; studied under the abbe Delille, who always remained his friend. He first applied himself to the languages, particularly most of the living ones, and made himself one of the best Hellenists in France. His studies were not directed to astronomy until his 30th year. He enriched the writings of Lalande with * commentary, and became the friend ftn<j Eupil of the author, who proudly called im his best icork. In 1790, eight years after the discovery of Herschel, Delambre publishedlhe tables of that planet, although in that period, it had performed but a small part of its 80 years' course. He also constructed tables of Jupiter and Saturn, and of the satellites of Jupiter, which, with several treatises, procured him a reception into the national institute. He was engaged with Mechain, from 1792 till 1799, in measuring an arc of the meridian from Barcelona to Dunkirk for the verification of which he measured two bases of 6000 toises, one near Melun, the other near Perpignan. (See his Base du Systkme Metrique de'cimal, ou Mesure de VArc du Meridien campris entre les Paralleles de Dunkerque et Barcelonne, Paris, 3 vols., 4to.; and Recueil d* Observed. Gtodtsiques faisant Suite au 3?/ie vol. de la Base du Syst. Metr. rbdigi par Biot et Arago). He was made member of the bureau des longitudes. In 1802, Napoleon appointed him inspecteurgineral des ttudes, which post he resigned when chosen perpetual secretary of the class of mathematical sciences (1803). His first tables of the sun were published in 1792; in 1806, appeared his new ones. In 1807, he succeeded Lalande in the college de France, and wrote his Traite' d'Astronomie theorique et pratique (3 vols., 4to., 1814), Histoire de VAstronomiedumoyen age (1819), Hist, de VAstron. moderne (1821,2 vols.) and Hist, de VAstron. du 18mc. Si&cle (2 vols.); a collection of works such as no other nation can show. Delambre also distinguished himself, as perpetual secretary of the institute, by the justice and elegance of his iloges. He died in 1822.