One sided flat mirror mounted to rotate in all directions by means of two semi-circular brass bars turned by worm gears and marked in degrees; the head piece is mounted on brass post on a brass cylindrical casing housing a clock mechanism that drives the two counter dials on the platform; all suspended on two brass posts with screw adjustment and protractor for precision adjustment of angle; on flat brass round base with levelling bubble and three levelling screw legs marked “153”; key attached to turn clock mechanism and partially adjust mirror angle; marked “J. Duboscq Ã Paris, no. 188”
Accession Number: 2009.uc.18
Primary Materials: Metal, Brass, Copper, Glass
Dimensions (cm): 38 x 26.5 x 26.5 cm
Provides a constant source of intense natural light. A clockwork mechanism adjusts a mirror in order to direct sunlight in a fixed direction. Uses include dark field microscopy and photomicrography.
Good. The metal surface shows some small scratches and some signs of corrosion.
Manufacturer: J. Duboscq, Paris
Date of Manufacture: c. 1880
Additional Information and References: