Accession No

0088

Brief Description

alt-azimuth surveying instrument, possibly miner's dial, by Cary, English, 1800 (c)

Origin

England; London

Maker

Cary

Class

surveying

Earliest Date

1800

Latest Date

1800

Inscription Date

Material

metal (brass, silver, steel); glass

Dimensions

length 290mm; breadth 160mm; height 242mm

Special Collection

Robert Whipple collection

Provenance

Purchased by Robert Stewart Whipple from T. H. Court on 14/01/1923.

Inscription

‘Cary London’ (on compass face)
‘Wilton St. DAY’ (on reverse)

Description Notes

Brass. Compass. 8 point silvered rose. Raised ring graduated 0-360˚ in single degrees. Steel needle; locking bar. Compass base extended at opposite sides to form supports for slit and window sights. Bubble mounted across arm. Clamped socket for attachment to tripod.
Vertical semi-circle; mounted on arms screwed to compass base. Limb graduated 90-0-90 to 30’. ‘Perpendicular’ 6-0-6 to 1 and ‘base’ 0-6-0 to 1. Read by indicator on frame support. Bubble mounted on frame. Pin hole and window sights on back of semicircle diameter.

References

Events