A treatise of the sphere; shewing how it is deriv'd from that theory which justly asserts the motion of the Earth: as also of the projections of it, both orthographical and stereographical : Demonstrating their properties from fundamental propositions, and shewing their uses. With the resolution of astronomical and chorographical problems. By the Late Reverend John Witty M.A. and chaplain to His Grace the Duke of Devonshire. - Witty, John. (Printed for J. Osborn, at the Golden Ball in Pater-Noster Row; and S. Birt, at the Bible in Ave-Mary-Lane, 1734)