JACKSON, CHARLES THOMAS Ameri can geologist, was born in Plymouth, Mass., June 21, 1805. He graduated from Harvard in 1829 and studied for two years in Paris. He was appointed State geologist of Maine in 1836, of Rhode Island in 1839, and of New Hampshire in 184o. He sur veyed the public lands in the Lake Superior region in 1847, where he discovered copper and iron. He established a laboratory in Boston in 1836 for research in analytical chemistry where, as early as 1842, he experimented with the anaesthetic qualities of sulphuric ether. He died in Somerville, Mass., Aug. 28, 1880.
He wrote The Final Report of Geology and Mineralogy for the State of New Hampshire (1884), and The Manual of Etheriza tion (1861).
For the part he played in the discovery of ether, see "Ether Dis covery—A Consideration of the Claims made by W. T. G. Morton, Horace Wells and C. T. Jackson"—A Report before the 32nd Congress, znd ses., 1853.