Accession No

2145

Brief Description

transit instrument, by Troughton and Simms, English, 1900 (c)

Origin

England; London

Maker

Troughton and Simms

Class

astronomy

Earliest Date

1900

Latest Date

1900

Inscription Date

Material

metal (oxidised brass, silver, brass); wood; glass

Dimensions

case length 495mm; breadth 214mm; height 165mm

Special Collection

Provenance

Inscription

‘TROUGHTON & SIMMS
LONDON’

Description Notes

Small transit instrument, oxidised brass. Flat-based stand with double A-frame support for axis. Axis secured in Y bearings by pivoted bars and clamping screws. Telescope with object glass fover, focus by knurled screw moving object glass, cross hairs, extended diagonal eyepiece with push-fit filter. Vertical circle, silvered scale divided 0 - 90˚ - 0 - 90˚ - 0, subdivided to 1˚ and to 30´; 2 silvered verniers marked ‘A’ and ‘B’, clamp and tangent screws, zero adjustment by knurled screw. 2 reading microscopes. Bubble level on telescope. Striding level.
Fitted wooden box with Troughton & Simms label. Turned brass container houses glazed centring device.

Condition

References

Events