Abbe total refractometer

Carl Leiss, Berlin-Steglitz
Abbe refractometer (black lacquered and nickel plated brass) on blackened cast iron base. Rotatable glass hemisphere (central hole for illumination from the bottom) with graduated circle (and vernier read-out) and mirror. Elbow shaped movable telescope connected to a graduated circle with vernier read-out. The telescope houses a slider with a Nicol analyzer, and a hinged magnifying lens in front of the eyepiece to transform it to a low-power microscope. Height 32 cm, vertical circle diameter 15 cm.
Signed on the graduated circle "DR. CARL LEISS BERLIN-STEGLITZ " on the vertical circle. Inventory numbers as IVd81 (scratched on the triangular base of the collimator) and 36049 (written with white paint on a tripod foot).

collection: Museum of Mineralogy, Babes-Bolyai University, Romania