“ Another relation at which he worked was that the diminution in the vapour-pressure of a solvent, caused by dissolving a substance in it, is proportional to the molecular weight of the substance dissolved—at least when the solution is dilute. ”

“ He became aspirant répétiteur at the lycée of Rheims in 1853, and after holding several intermediate positions was appointed in 1862 to the professorship of chemistry in Sens lycée, where he prepared the thesis on electromotive force which gained him his doctor's degree at Paris in the following year. ”