MANROSS, Newton Spaulding, mining engineer, born in Bristol, Connecticut, 20 June, 1825; died near Sharpsburg, Maryland, 17 September, 1862. He was graduated at Yale in 1850, then studied at the University of Gottingen, where in 1852 he received the degree of Ph.D. Subsequently he visited mines and metallurgical establishments in Europe, but returned to the United States in 1852. In the autumn of 1853 he was sent with an exploring expedition to South America, and spent several months in examining the gold region of the Yuruari between Orinoco and Amazon rivers. On his way home, in 1854, he examined the Pitch lake of Trinidad, and in 1856 he was sent to the Isthmus of Panama to explore for coal, iron-ore, and other minerals. During the same year he visited Mexico, and was engaged in examining the country between the city of Mexico and the Pacific ocean for coal and iron, also visiting the celebrated silver districts, and descending into the craters of Jorullo and Popocatepetl. He returned in July, 1857, to Bristol, where he remained for several years engaged in perfecting mechanical and chemical inventions. In 1861 he became acting professor of chemistry in Amherst, but in the summer of 1862 he raised a company of volunteers, went to the front as captain in the 16th Connecticut regiment, and was killed at the battle of the Antietam. Dr. Manross contributed scientific papers to the "American Journal of Science."