BOULBY, a hamlet in the parish of EASINGTON, eastern division of the liberty of LANGBAURGH, North riding of the county of YORK, 11 miles (N. W. by W.) from Whitby. The population is returned with the parish. This place is noted for its extensive alum-works, which were begun in 1615; they contain various petrifactions of ammonites, or snake stones, trochita, and shells of the bivalve kind.