Accession No

2806

Brief Description

improved level, by Troughton, English, 1805 - 1825

Origin

England; London

Maker

Troughton

Class

surveying

Earliest Date

1805

Latest Date

1825

Inscription Date

Material

metal (brass, steel, white metal); glass; liquid; wood

Dimensions

length 430mm; breadth 110mm; height 141mm; tripod box length 667mm; breadth 140mm; height 123mm

Special Collection

Provenance

Purchased from Historical Technology Inc., Masssachustts, USA, 18/01/1982. Purchased with assistance from the Preservation Fund, Science Museum (PRISM).

Inscription

‘Troughton London‘ (on compass)

Description Notes

Telescope with cross-hairs, rack and pinion focus (broken) and moving eyepiece. Cover for objective. Longitudinal bubble level set into top of telescope. Compass set over bubble level. Silvered 8-point rose, lower scale divided [0] - [90] - [0] - [90] - [0] numbered by 10, upper scale divided [0] - 360 numbered by 10 subdivided to 1. Steel needle with brass locking mechanism. Glass cover. Compass set on 4 brass pillars. Level screwed to base with 4 levelling feet on parallel plates and 3 sockets for attachment to tripod. Fitted wooden box. Diagonal eyepiece.

7 parts with level
5 parts with box and mount

Complete

References

Events