Accession No

2553

Brief Description

Abney level by Troughton & Simms, c.1880

Origin

London; England

Maker

Troughton & Simms

Class

surveying

Earliest Date

1880

Latest Date

1880

Inscription Date

Material

metal (brass; oxidised brass); glass

Dimensions

length 118mm; height 41mm; breadth 31mm box height 125mm; breadth 50mm; depth 39mm

Special Collection

Provenance

Purchased from Sotheby’s Belgravia, London, England; lot 150, 09/05/1980.

Inscription

‘TROUGHTON & SIMMS LONDON’ (tube)

Description Notes

Oxidised brass sighting tube. Pinhole sight. Diagonal mirror fixed below window in tube to allow viewing of bubble simultaneously. Triangular plate fixed rigidly to tube; axis supporting graduated toothed semicircle, controlled by milled screw. Semicircle divided 40˚ - 0 - 40˚, numbered by 10˚, graduated to 1˚; also scale of inclination from 1 in 1 to 1 in 10. Bubble level fixed to reverse of semicircle.
Leather case.

Condition good; complete.

References

Events