In 1814 Delambre was appointed a member of the Council of Public Instruction, but was deprived of it in the following year. He was in Paris when it was taken by the allied armies ; and shortly afterwards, writing to one of his friends, he says he worked with perfect tranquil lity from eight in the morning till midnight in the continued hearing of the cannonade. Such self-possession for study under that tremen dous attack, and such absence of interest in the result of the great struggle, to say nothing of indifference to personal danger, is what we confess ourselves unable to understand. In the midst of active exer tion we may be fearless of personal danger ; but Delambre was in his study, and professes to have felt not only perfectly calm but to have been able to pursue his scientific labours for sixteen hours in the very midst of the cannonade. He escaped uninjured.
On the creation of the Legion of Honour, Delambro was oonstituted a member of that body, and soon after an hereditary chevalier, with a pension, as a reward for his scientific services ; and finally, in 1821 he was created an officer of that body. In 1817 he was created a chevalier of the order of St. MichaeL The death of Delambre occurred on the 19th of August 1822, at the age of seventy-two. It was preceded by a total loss of strength and frequent and long-continued fainting-fits, with the other symptoms of a constitution worn out by hard mental and bodily labour. He died as he had lived, calmly, and though not without great suffering, yet without a single complaint.
The writings of Delambre are exceedingly numerous. The following is a list of his separate works in the order of their publication :— 1, Tables do Jupiter et do Saturne, 1789 ; 2, Tables du Soleil, de Jupiter, de Saturne, d'Uranns, et des Satellites de Jupiter, pour servir k is 3me edition de rAstronomie de Lalande,' 1792 ; 3, '146thodes Analytiques pour la &germination d'un Arc du Mdridien,' 1799; 4, ' Tables Trigonomdtriques Ddcimales,' par Borda, revues, augmentdes, poblides par M. Delambre,' 1801; 5, Tables du Soleil,' publides par
le Bureau des Longitudes, 1806; 6, 'Base du Systeme Mdtrique D6cimal,' 3 voles, 1806-10; 7, 'Rapport Historicism sur les Progress des Sciences Mathdmatiquea depuis 1789; 1810 ; 8, Abrdgd d'Astronomie, on Lecons Eldmentaires d'Astronomie Thdorique et Pratique ;' 9, Astronomie Thdorique et Pratiqne,' 4to, 3 vols., 1814 ; 10, ' Tables Ecliptiques des Satellites de Jupiter,' 1817 ; 11, ' Elistoire de rAstro nornie Ancienno,' 2 vole. 4to, 1817; 12, ' llistoire de 1'Aatronomie du ?doyen Age,' 1 voL 4to, 1819 ; 13, ' Histoire de I'Aetronomie Moderne,' 2 vole. 4to, 1821 ; 14, Histoire de I'Astronomie au Dix-huitieme Siecle,' 4to, 1827, published under the care of Matthieu.
Besides these separate works, Delambre published a considerable number of memoirs in the collections of Petersburg, Turin, Stockholm, and Berlin, independently of those which appeared in the Mdmoires de l'Institut do France :' also twenty-eight memoirs on different sub jects (astronomy, geodesy, and astronomical history) in the ' Connais sance des Tempe,' from 1783 to 1820. A list of these may bo seen in Costa's indexes to that work for 1807 and 1822.
Any attempt to analyse the writings of Delambre would far exceed the limits which can be allowed in this Cycloptedia. It is sufficient to say they are well worthy of the praise which has been beetowed upon them, as they are not only all excellent in their kind, but throughout marked with an original mind, indicate the most devoted enthusiasm to their several subjects, and prove that their author combined the spirit of scientific inquiry with the feelings and habits of literature in a degree that the history of a single individual has hardly ever before or since exhibited.