Accession No

0926

Brief Description

reflecting circle, by E. Troughton, English, 1800 (c)

Origin

England; London

Maker

Troughton, E.

Class

surveying

Earliest Date

1800

Latest Date

1800

Inscription Date

Material

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

Dimensions

box length 304mm; breadth 303mm; height 155mm

Special Collection

Robert Whipple collection

Provenance

Inscription

‘Troughton London’
‘72’

Description Notes

Oxidised brass reflecting circle, lattice-type frame. Adjustable index mirror. Telescope sights. Horizon glass. Two sets of 3 shades. Three index arms, each with mount for reading microscope (missing) and silvered, type-B vernier, one with clamp and tangent screws. Silvered 720˚ scale, divided by degrees, subdivided to 20’ and part numbered 160 - 0 - 160. Two mahogany handles with a third screwing into either side. Fitted mahogany box.

References

Events