EMERSON, Benjamin Dudley, educator, born in Hampstead, New Hampshire, in 1781 ; died in Jamaica Plain, now a part of Boston, 2 October 1872. He was graduated at Dartmouth in 1805, was a teacher in Newburyport, Massachusetts, in 1810'17, and afterward principal of the Adams grammar school, Boston, for many years. He was associated with his brother Frederick in the preparation of schoolbooks, and his spelling books, readers, and arithmetic became widely popular. He also published an "Academical Speaker" (Boston). According to the provisions of his will, the bulk of his property was given for religious and educational purposes. In it he provided for the establishment of the Hampstead high school, and left $100,000 to Dartmouth College.

His brother, Frederick Emerson, author, born in Hampstead, N. H., 28 November 1788; died in Boston, Massachusetts, in 1857, was for many years a well known teacher in Boston, and was for some time superintendent of schools there. He published a series of arithmetic, which were largely used in schools, including the "North American Arithmetic," in three parts (Boston, 1884).