NESMOND, Georges Henry Emile de (nes-mond), Flemish explorer, born in Oudenarde in 1793; died in Paris in 1852. He served in the French army during the last years of the reign of Napoleon I., and afterward was professor of mathematics and geology in Mons Louvain, and Paris. In 1840 he was sent to explore Central America, where he remained for several years. He made a particular study of volcanoes, remained several months in San Salvador, studied the geological formation of the district of La Union in the Bay of Fonseca, and later went to Mexico. He published "Voyage scientifique dans l'Amerique Centrale" (2 vols., Paris, 1847); " Etudes sur les couches geologiques des terrains du district de la Union clans la Bale de Fonseca" (2 vols., 1849); and "Etudes sur les volcans de l'Amerique Centrale" (3 vols., 1850).