Heliostat

Unidentified · University College

Accession Number: 2009.uc.18

Instrument Name: Heliostat

Description:

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 à Paris, no. 188″

Alternative Name:

Primary Materials: metal, brass, copper, glass

Markings:

Dimensions (cm): 38 x 26.5 x 26.5 cm

Function:

Provides a constant source of intense light. A clockwork mechanism adjusts a mirror in order to direct sunlight in a fixed direction. Uses include dark field microscopy and photomicrography.

Condition:

Associated Instruments:

Manufacturer: J. Duboscq, Paris

Date of Manufacture: c. 1880

Provenance:

Donated to UTSIC: No

Historical Notes: