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WILHELM HEINRICH [GUILLAUME HENRI] DU...

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Originally appearing in Volume V08, Page 646 of the 1911 Encyclopedia Britannica.
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WILHELM HEINRICH [See also:

GUILLAUME See also:HENRI] See also:DUFOUR (1787–1875)  , Swiss See also:general, was See also:born at See also:Constance of Genevese parents temporarily in See also:exile, on the 15th of See also:September 1787 . In 1807 he went to the Ecole Polytechnique at See also:Paris, See also:Switzerland being then under See also:French See also:rule, taking the 14oth See also:place only in his entrance examination . By two years' See also:close study he so greatly improved his position that he was ranked fifth in the exit examination . Immediately on leaving the school he received a See also:commission in the See also:engineers, and was sent to serve in See also:Corfu, which was blockaded by the See also:English . During the See also:Hundred Days he attained the See also:rank of captian, and was employed in raising fortifications at See also:Grenoble . After the See also:peace that followed See also:Waterloo he resumed his status as a Swiss See also:citizen, and devoted himself to the military service of his native See also:land . From 1819 to 1830 he was See also:chief instructor in the military school of See also:Thun, which had been founded mainly through his instrumentality . Among other distinguished See also:foreign pupils he instructed See also:Louis See also:Napoleon, afterwards See also:emperor of the French . In 1827 he was raised to the rank of See also:colonel, and commanded the Federal See also:army in a See also:series of See also:field manoeuvres . In 1831 he became chief of the See also:staff, and soon afterwards he was appointed quartermaster-general . Two years later the See also:diet commissioned him to superintend the See also:execution of a See also:complete trigonometrical survey of Switzerland . He had already made a cadastral survey of the See also:canton of See also:Geneva, and published a See also:map of the canton on the See also:scale of 15 00 .

The larger See also:

work occupied See also:thirty-two years, and was accomplished with complete success . Themap in 25 sheets on the scale of , o aaoa was published at intervals between 1842 and 1865, and is an admirable specimen of cartography . In recognition of the ability with which See also:Dufour had carried out his task, the Federal See also:Council in 1868 ordered the highest See also:peak of See also:Monte See also:Rosa to be named Dufour Spitze . In 1847 Dufour was made general of the Federal Army, which was employed in reducing the revolted See also:Catholic cantons . The quickness and thoroughness with which he performed the painful task, and the See also:wise moderation with which he treated his vanquished See also:fellow-countrymen, were acknowledged by a See also:gift of 6o,000 francs from the diet and various honours from different cities and cantons of the confederaton . In politics he belonged to the moderate conservative party, and he consequently lost a See also:good See also:deal of his popularity in 1848 . In 1864 he presided over the See also:international See also:conference which framed the Geneva See also:Convention as to the treatment of the wounded in See also:time of See also:war, &c . He died on the 14th of See also:July 1875 . His De la fortification permanente (185o) is an important and See also:original contribution to the See also:science of fortification, and he was also the author of a Memoire sur l'artillerie See also:des anciens et sur See also:celle du moyen dge (184o), See also:Manuel de tactique pour See also:les officiers de toutes acmes (1842), and various other See also:works in military science . His memoir, La Campagne du Sonderbund (Paris, 1876), is prefaced by a See also:biographical See also:notice . An equestrian statue of General Dufour was erected after his See also:death at Geneva by See also:national subscription . DUFR$See also:NOY, OURS See also:PIERRE ARMAND See also:PETIT (1792–1857), French geologist and mineralogist, was born at Sevran, in the See also:department of See also:Seine-et-See also:Oise, in See also:France, on the 5th of September 1792 .

After leaving the Imperial See also:

Lyceum, in 1811, he studied till 1813 at the Ecole Polytechnique, and then entered the See also:Corps des Mines . He subsequently assisted in the management of the Dcole des Mines, of which he was See also:professor of See also:mineralogy and afterwards director . He was also professor of See also:geology at the 1 See also:cole des Ponts et Chausses . In See also:conjunction with See also:Elie de See also:Beaumont he in 1841 published a See also:great See also:geological map of France, the result of investigations carried on during thirteen years (r823–1836) . Five years (1836–1841) were spent in See also:writing the See also:text to accompany the map, the publication of the work with two See also:quarto vols. of text extending from 1841–1848; a third See also:volume was issued in 1873 . The two authors had already together published Voyage metallurgique en Angleterre (1827, 2nd ed . 1837-1839),Memoires pour servir d une description geologique de la France, in four vols . (183o-1838), and a Memoire on See also:Cantal and Mont-See also:Dore (1833) . Other See also:literary productions of Dufrenoy are an See also:account of the See also:iron mines of the eastern See also:Pyrenees (1834), and a See also:treatise on mineralogy (3 vols. and See also:atlas, 1844–1845; 2nd ed., 4 vols. and atlas, 1856–1859), in which the geological relations as well as the See also:physical and chemical properties of minerals were dealt with; he likewise contributed numerous papers to the Annales des mines and other scientific publications, one of the most interesting of which is entitled Des terrains volcaniques des environs de See also:Naples . Dufrenoy was a member of the See also:Academy of Sciences, a See also:commander of the See also:Legion of See also:Honour, and an inspector-general of mines . He died in Paris on the loth of See also:March 1857 .

End of Article: WILHELM HEINRICH [GUILLAUME HENRI] DUFOUR (1787–1875)
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