M. D., LL. D Dana Samuel Luther, an American chemist, born at Amherst, N. H., July 11, 1795, died in Lowell, Mass., March 11, 1868. He graduated at Harvard college in 1813, during the war with Great Britain, and received a commission as lieutenant in the 1st United States artillery, with which he served in New York and Virginia until the close of the war. The army having been disbanded, he resigned his commission in June, 1815, and commenced the study of medicine, receiving his degree of M. D. in 1818. From 1819 to 1826 he practised his profession at Waltham, Mass., established a chemical laboratory for the manufacture of oil of vitriol and bleaching salts, and founded the Newton chemical company, of which he was the chemist till 1834. He then became resident and consulting chemist to the Merrimack manufacturing company, the duties of which office he performed till his death. He was associated with his brother, Prof. James F. Dana, in publishing the "Mineralogy and Geology of Boston and its Vicinity" (1818). His next publication, made while he was in England in 1833, was a clear exposition of the chemical changes occurring in the manufacture of sulphuric acid. This was followed by a report to the city council of Lowell on the danger arising from the use of lead water pipes.

About this period his agricultural experiments and observations were made, and the materials obtained for "The Farmers' Muck Manual," published in 1842. "An Essay on Manures" was honored by the prize of the Massachusetts agricultural society in 1843. His translation and systematic arrangement of the treatise of Tanquerel on lead diseases was an important contribution to medical knowledge. The discussion of the lead pipe question gave rise to several papers and pamphlets from his pen. His investigations shed light on the more obscure points of the art of printing cotton, and led to many improvements. His discoveries in connection with bleaching cotton were first published in the Bulletin de la societe industrielle de Mulhouse. The principles there established have led to the American method of bleaching, of which Persoz, in his Traite de Vimpression des tissues, says that "it realizes the perfection of chemical operations".