A new method for discovering the longitude both at sea and land, humbly proposed to the consideration of the publick. By William Whiston, M. A. sometime professor of the mathematicks in the University of Cambridge and Humphry Ditton, master of the new mat

A new method for discovering the longitude both at sea and land, humbly proposed to the consideration of the publick. By William Whiston, M. A. sometime professor of the mathematicks in the University of Cambridge and Humphry Ditton, master of the new mathematick school, in Christ's hospital, London