American Unitarian clergyman and educator, born at New Brunswick, NJ, on the 7th of January 1818. He studied theology at Cambridge, and was ordained pastor at Waltham, MA, in 1845. From 1859 to 1868 he was successively president of Antioch College and of Harvard College. In 1868 he resigned on account of bad health. Then he became botanist of the Hassler expedition around the coast of South America under Professor Agassiz, in 1871. In 1872 he was pastor of a church at Portland, ME, and remained till 1888. Hill published Geometry and Faith (1849); Liberal Education (1858); Jesus the Interpreter of Nature (1859); Natural Sources of Theology (1877); and some elementary mathematical books. He died in Waltham, MA, on the 21st of November 1891.