Accession No

0436

Brief Description

prismatic compass, by T. Rubergall, English, 1830 (c)

Origin

England; London

Maker

Rubergall, T.

Class

surveying; magnetism

Earliest Date

1830

Latest Date

1830

Inscription Date

Material

metal (brass, oxidized brass); glass, rope (string); paper

Dimensions

length 122mm; diameter 101mm; height 100mm

Special Collection

Robert Whipple collection

Provenance

Purchased by Robert Stewart Whipple from T.H. Court in 05/1927. From the Cooke Collection, according to the accession register.

Inscription

‘T. Rubergall London ‘ (on prism mount)

Description Notes

Brass box unscrews from oxidized brass rim sights and prism mount. Green card compass wiht 8-point rose graduated [0] - 360 numbered by 10 subdivided to 30’. Locking spring operated from side of box. Clamp when compass not in use. Glass cover. Prism and window-and-hair fore-sight mounted on bar which transects the circle. Falls forward when not in use. Back sight slit on hinged limb projecting from compass box.

Condition good (string broken); complete

References

Events