Accession No

1391

Brief Description

heliostat, by J. Duboscq-Soleil, French, 1850 (c)

Origin

France; Paris

Maker

Duboscq-Soleil, J.

Class

optical

Earliest Date

1850

Latest Date

1850

Inscription Date

Material

metal (brass); glass; paper (cardboard)

Dimensions

height 340mm; length 240mm; breadth 240mm box length 154mm; breadth 91mm; height 41mm

Special Collection

Provenance

Inscription

‘J.C. Silbermann Invent
J. Duboscq-Soleil fecit à Paris’
‘No. 56’

Description Notes

Silbermann heliostat, brass. Circular base pivots on flat tripod stand with 3 levelling screws. Clamp and setting scale. Bubble level. Two brass uprights support brass-cased clockwork movement. Setting arc divided on brass 0 - 110 by 1˚, subdivided to 30´, with clamping screw and vernier. Pillar rises from clock movement (clamping screw), to mirror mount with two brass arcs and brass circle. One arc divided with declination scale 30-0-30 by 1˚, subdivided to 30´, with date scale on reverse. Other arc with clamping screw but undivided. Circle divided in hours 12-0-12, subdivided to 5 mins, and marked ‘Midi’, ‘Est’, ‘Minuit’, ‘Ouest’.
Cardboard box marked ‘Mirrors for Small Heliostat’ containing 1 mirror mount, 2 metal mirrors and 1 black mirror.

Condition

References

Events