DU MOTAY, Cyprien Tessie, chemist, born in France in 1819 ; died in New York City, 6 June 1880. He was of an old Breton family, received his education at Nantes, and then removed to Paris, where he devoted himself to literature. His poems gained him admission to the salon of Madam R6camier, and he became intimate with the foremost writers of the day, including De Musset, Chateaubriand, Victor Hugo, and Dumas. Financial troubles drove him to Germany, where, turning his attention to chemistry and metallurgy, he secured several patents, one of which, for bleaching and dyeing fabrics, was bought by an English manufacturer for 60,000 francs. He then returned to Paris and became consulting chemist in a large laboratory, but was exiled for opposing the second erapire, and saved himself from poverty by selling a process for bleaching wax to a London apothecary for £2,000.

Napoleon III recalled him to Paris in 1860, and he applied himself from that time to industrial chemistry, receiving medals at the exhibitions of 1865 and 1878 for his invention. During the siege of Paris he directed the ambulance service. Among his many important inventions in Europe were a process for etching glass, improvements in electric light carbons, a method for the preparation of oxygen on a large scale, and a method of illumination by its use, known as the "oxycarbureted light," which has been successfully used for lighting mines and large public places. Du Moray came to New York early in 1879, and was consulting engineer and chemist of the Municipal gas company till his death. While in this country he patented small rotary motors, improvements in steam condensers (1879), and a new method of artificial refrigeration (1880). He left in manuscript a philosophical drama, "The Expiation of Faust."