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Radcliffe Tracts 77 (9)Martin, Benjamin
"A Catalogue of Philosophical, Optical, and Mathematical Instruments, Made and Sold by Benjamin Martin, At his Shop, the Sign of the Visual Glasses and Globe, two Doors below Crane-Court, in Fleet-Street"
in An Essay on Visual Glasses, (Vulgarly called Spectacles) ... (London, 1758), part (pp. 4-8) of separately paginated addendum beginning "Directions For the Use of the General Apparatus of Optical Instruments".