METCALFE, Samuel L., physician, born near Winchester, Virginia, 21 September, 1798; died in Cape May, New Jersey, 17 July, 1856. He removed with his parents to Shelby county, Kentucky, in early life, and in 1819 entered Transylvania university, Lexington, where in 1823 he received the degree of M. D. He practised in New Albany, Indiana. and later in Mississippi, but in 1831 went to England. On his return he made a geological tour through eastern Tennessee, North Carolina, and Virginia. For several years thereafter he resided in New York city and devoted himself to writing scientific books, also contributing to the " Knickerbocker Magazine" under the initial "M." In 1835 he again visited England in order to give his attention to scientific research, and during this visit he was solicited to become a candidate for the Gregorian chair in the University of Edinburgh, but declined. He then returned to the United States and devoted his energies to publishing his books. Dr. Metcalfe was the author of " Narratives of Indium Warfare in the West" (Lexington, 1821); "New Theory of Terrestrial Magnetism " (New York, 1833); and "Caloric: its Agencies in the Phenomena of Nature" (2 vols., London, 1843 ; 2d ed., Philadelphia, 1853).