American mathematician, born in New Haven, CT, on the 23rd of May 1759; graduated from Yale in 1777; taught in New Haven and Philadelphia till 1802, and then entered the army, as captain of engineers. In 1805 he was made major, and in 1808 lieutenant-colonel. From 1803 to 1812 he was United States surveyor of Ohio and the Northwest Territory, and then till 1828 was professor of experimental and natural philosophy in the United States Military Academy. He wrote Essays, Mathematical and Physical (1802). He died on the 3rd of February 1830.
