The process was worked out by Deville in his laboratory at the Ecole Normale in Paris.
After studying at the Ecole normale superieure, he completed his studies in Germany.
After studying at the Ecole Normale Superieure he held history professorships at various lycdes.
They showed their gratitude by dedicating a book to him in 1896, Etudes d'histoire age, and after his retirement in 1905 by having his features engraved on a slab (see A Gabriel Monod, en souvenir de son enseignement: ecole pratique des hautes etudes, 1868-1905, ecole normale superieure, 1880-1904.
In 1865 he obtained a fellowship in history, and in 1875 became a doctor of letters; he was appointed maitre de conference (1876) at the ecole normale superieure, succeeding Fustel de Coulanges, and then professor of modern history at the Sorbonne (1888), in the place of Henri Wallon.
Appointed to a lectureship at the Ecole Normale Superieure in February 1870, to a professorship at the Paris faculty of letters in 1875, and to the chair of medieval history created for him at the Sorbonne in 1878, he applied himself to the study of the political institutions of ancient France.
In 1870 he was at the Ecole Normale Superieure in Paris, but enlisted in the army, and was wounded.
After a stay at Strassburg as professor of the Petit Seminaire, he was appointed director of the College Stanislas in Paris in 1842 and, in 1847, chaplain of the Ecole Normale Superieure.
Educated at the Ecole Normale Superieure, he taught for some years in the lycee at Algiers before he joined the diplomatic service in 1871.
To appreciate it without prejudice, one should recall that this assembly saved France from a civil war and invasion, that it founded the system of public education (Museum, Ecole Polytechnique, .Ecole Normale Superieure, Ecole des Langues orientales, Conservatoire), created institutions of capital importance, like that of the Grand Livre de la Dette publique, and definitely established the social and political gains of the Revolution.