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MAKER: OPTICAL INSTITUTE IN WETZLAR, POSSIBLY REXROTH*

MODEL: UNKNOWN-POSSIBLY AN EARLY PROTOTYPE

c. 1850's-1860's-possibly c. 1865 if by Rexroth

Continental Microscope from the Optical Institute of Wetzlar

Continental Microscope from the Optical Institute of Wetzlar

substage rack The substage includes a conical wheel of apertures, including one slit for oblique illumination. There are click stops for each aperture. An unusual feature of this is the rack and pinion control of the distance of the apertures from the stage and the fact that the rack is triangular and runs through the stage itself rather than being on a tail piece. The piece holding the wheel is screwed into the bottom of the rack. This wheel of apertures, or 'stops' is permanently attached; i.e. there is no provision for substituting a condenser.