“ He graduated D. ès Sc. in 1847; in 1852 he was appointed to the chair of geology at the University of Grenoble, and in 1881 to that of the École Normale Supérieure in Paris. He was distinguished for his researches on the geology of the French Alps, being engaged on the geological survey of the departments of Isère, Drôme and the Hautes Alpes, of which he prepared the maps and explanatory memoirs. ”