Dupin. I. Andre Marie Jean Jaeques, a French lawyer and politician, born at Varzy, Feb. 1, 1783, died Nov. 10, 1865. He was early distinguished as a learned lawyer and an able speaker. A member of the chamber of deputies in 1815, he opposed the motion to proclaim the son of Napoleon I. emperor after his father's second abdication. The same year, in conjunction with Berryer, he was appointed counsel for Marshal Ney, and, gaining great popularity by his defence, was chosen to defend many political offenders. Among his most famous speeches were those in behalf of Beranger in 1821, and of the Journal des Debate on the eve of the revolution of 1830. Having become a member of the chamber of deputies, it was in great part through his exertions in that body that the duke of Orleans secured the crown, and he became a member of Louis Philippe's first cabinet. From 1832 to 1840 he was president of the chamber of deputies, and from 1849 to 1851 of the legislative assembly. He made some show of opposition to the government of Louis Napoleon, was taken unawares by the coup d'etat of Dec. 2, but declined all participation or responsibility in the parliamentary resistance, and retained his office of attorney general.

This, however, he resigned on the publication of the imperial decrees of 1852 confiscating the Orleans property; in 1857 he was reinstated. His writings, mainly on legal subjects, are numerous. His bons mots were renowned. II. Pierre Charles Francois, baron, brother of the preceding, born at Varzy, Oct. 6, 1784, died in Paris in January, 1873. He entered the navy as an engineer, and was actively employed in France and the Ionian islands. In 1812 a series of scientific papers attracted the attention of the academy of sciences. During 1814 and 1815 he evinced liberal opinions, but finally adhered to the Bourbons. In 1816 he visited Great Britain, to examine the general resources of the United Kingdom. The results of his travels, continued for more than four years, appeared in his Voyages dans la Grande Bretagne (6 vols., Paris, 1820-'24), and his Force commerciale de la Grande Bretagne (1826). He caused gratuitous lectures on the application of science to industry, for the benefit of workmen and artisans, to be established in the conservatoire des arts et metiers at Paris, and was appointed professor of geometry in that institution. His services were rewarded with a barony.

In 1825 and 1826 he instituted a private inquiry into the intellectual and productive resources of France, the results of which he embodied in his Situation progressive de la France depuis 1814. In 1828 he was elected to the chamber of deputies. He adhered to the government of Louis Philippe, and was made a peer in 1837; but he nevertheless continued his regular course of public lectures. After the revolution of 1848 he was elected to the constituent and legislative assemblies, acted with the majority, and on the overthrow of the republic became a supporter of the imperial government. He wrote numerous works besides those mentioned, relating mainly to statistics and political economy. He left a fortune of 10,000,000 francs.