Lapis, opal, &c. are poliſh'd on a wooden wheel. To faſhion and Engrave vaſes of agate, cryſtal, lapis, or the like, they make uſe of a kind of lathe like that us'd by pewterers, excepting that as the pewterers lathe holds the veſſels, which are to be wrought with proper tools; that of the Engraver generally holds the tools which are turn'd by a wheel, and the veſſels held to them to be cut and engraven either in relievo or otherwiſe; …