Heather, John Fry A Treatise On Mathematical Instruments: Including Most of the Instruments Employed in Drawing, for Assisting the Vision, in Surveying and Levelling, ... : In Which Their Constuction, and the Met
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A Treatise On Mathematical Instruments: Including Most of the Instruments Employed in Drawing, for Assisting the Vision, in Surveying and Levelling, ... : In Which Their Constuction, and the Met