Accession No

2214

Brief Description

Brunton mine transit, clino-dial, by J. H. Steward, English, 1930

Origin

England; London; 406 & 457 Strand

Maker

J. H. Steward

Class

surveying

Earliest Date

1930

Latest Date

1930

Inscription Date

Material

metal (brass, aluminium, oxidized brass, steel); glass

Dimensions

height when open 95mm; depth 76mm

Special Collection

Provenance

Transferred from Department of Geography, University of Cambridge, Cambridge, England, 05/1969.

Inscription

‘Clino-Dial
Patent
J.H.Steward
406, & 457, STRAND
7, Gracechurch ST.
London.’ (outside of lid)

Description Notes

Aluminium box containing mirror and compass. Compass in base with raised degree circle divided [0] - 360 numbered by 10 graduated to 1 degree. Second scale on base of compass divided 90 - 0 - 90 numbered by 10 graduated to 1. 8 points marked. Rotating Vernier scale and bubble level moved by bar underneath compass. Steel needle with locking bar and screw. Lid holds mirror with vertical diamebral line marked on it. Non-mirrored glass oval at bottom of line for sighting object. Oxidized brass sight on opposite side of compass from hinge; tip hinges separately and has pinhole sight. Base of instrument is grooved (to allow mounting on tripod (?)).

References

Events