Accession No

2359

Brief Description

prismatic compass, by Elliott Brothers, English 1853-1890 (c)

Origin

England; London; Strand

Maker

Elliott Brothers

Class

surveying; magnetism

Earliest Date

1853

Latest Date

1890

Inscription Date

Material

metal (brass); paper (card); glass; hide (leather)

Dimensions

case length 105mm; breadth 83mm; thickness 37mm

Special Collection

Provenance

Donated by R.S. Newall.

Inscription

‘Elliott Bros Strand LONDON’ (on card)

Description Notes

Brass compass with brass lid. Folding sighting window with hair. Green card dial; 4 points graduated 0-360˚ in half degrees. North end of needle at 180˚. Locking spring below sighting window. Prism hinged on a sliding plate moved by means of a ‘thumb nail’ stud to allow focussing on the scale. Back sight slit over prism. Prism hinges back when not in use. Ray shade. Leather case.

References

Events