DELAMBRE, JEAN BAPTISTE JOSEPH French astronomer, was born at Amiens on Sept. 19, 1749. In 1771 he became tutor to the son of M. d'Assy, receiver-general of finances. He attended the lectures of J. J. Lalande, who induced d'Assy in 1788 to install an observatory for his benefit at his own residence. Here Delambre observed and computed almost uninter ruptedly, and in 1790 obtained for his Tables of Uranus the prize offered by the academy of sciences. He was admitted to the In stitute on its organization in 1795, and became, in 1803, perpetual secretary to its mathematical section. He served from 1795 on the bureau of longitudes. From 1792 to 1799 he was occupied with the measurement of the arc of the meridian extending from Dunkirk to Barcelona, and published a detailed account of the operations in Base du systeme metrique (3 vols., 18o6, 1807, 181o) . He succeeded Lalande in 1807 as professor of astronomy at the College de France, and was treasurer to the imperial uni versity from 18o8 until its suppression in Delambre died in Paris on Aug. 19, 1822. He wrote: Histoire de l'astronomie ancienne (2 vols., 1817) ; Histoire de l'astronomie au moyen dge 0810; Histoire de l'astronomie modern (2 vols., 18 21) ; His toire de l'astronomie au X VIII" siecle (edit. C. L.Mathieu, 1827) ; Tables ecliptiques des satellites de Jupiter, inserted in the third edition of J. J. Lalande's Astronomie (1792), and republished in an improved form by the bureau of longitudes in 1817, and other works.