Catoptric microscope Product:Postcard with the title on a

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Catoptric microscope Product:Postcard with the title on aView of a microscope shown on a pedestal stand: with a section through the instrument, a scheme of its optical arrangement and details of the mirror based instrument. The microscope was inspired by the Newtonian reflecting telescope. From the manuscript paper 'An account of a catoptric microscope', by Robert Barker. Not signed. Royal Society Register Book Original, vol. 19 1734 1736, pp. 256 260. The paper was read before the Royal Society on 8