Description of an Engine for Dividing Strait Lines on Mathematical Instruments. by Mr. J. Ramsden, Mathematical Instrument-Maker, and Optician. Published by Order of the Commissioners of LongitudeJ. Ramsden · First published 2018Open the Tome
Description d'une lunette achromatique, faite et debité [sic] par J. Ramsden, ... vis-à-vis de Sackville Street, Piccadilly, à LondresJ. Ramsden · First published 1775Open the Tome