Accession No

1547

Brief Description

heliostat, W. Watson & Son, 1900 (c)

Origin

313; High Holborn; London

Maker

Watson & Sons

Class

astronomy; optical

Earliest Date

1900

Latest Date

Inscription Date

Material

wood (mahogany); metal (brass, oxidised brass); glass

Dimensions

box length 330mm; breadth 398mm; height 350mm

Special Collection

Provenance

Transferred from the Department of Mineralogy & Petrology, University of Cambridge, in 02/1968.

Inscription

‘W. WATSON & SONS
MANUFACTURERS
313 HIGH HOLBORN
LONDON’

Description Notes

Mahogany base with 3 brass levelling screws. 2 circular bubble levels. Hinged wooden platform with 2 brass setting arcs divided 47-66 by 1 and 2 clamping screws. Clockwork movement in part-oxidised brass cylindrical casing, marked with 4 cardinal points on top platform. Clamp and tangent screw moves mirror and central ring of platform and may be fitted to either side. Double knurled screw raises or lowers mirror mount with 2 brass counter-weights. Silvered mirror. Maker’s plate. Wooden box.

References

Events