J. Duboscq Sun microscope
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A Jules Duboscq solar microscope, Paris C 1885. They use the solar microscope on a magic lantern  or heliostate  for projetion micrographs on a screen. The original mirror ( 33x 13,5 cm) is in perfect condition. The diameter of the lens is 9 cm. Two adjustments are provided to move the mirror to follow the motion of the sun as well. Two accessoires to put on the lens tube, one with adjustable aperture and one with an Arrow. Measurement 22 x 22 x 34 cm and in mint and working condition.
