Diamond- pattern frame sextant.

Made:
1835-1845 in Fleet Street
maker:
Troughton and Simms Limited

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Sextant made by Edward Troughton and William Simms, London, about 1840. Polished brass diamond-pattern frame and
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Polished brass sextant, diamond-pattern frame type, with polished brass limb wooden handle and threaded hole for stand with shaped mahogany case by Troughton and Simms, Fleet St., City of London, England, 1835-1845. Consists of inlaid 129° silver scale (-45° to 150°) with 10' divisions, vernier scale (10") two sets of filter shades (4 & 3, red & green) and reading magnifier on a swivel arm (70mm). Fitted with threaded telescope bracket with collimation correction for two telescopes, 73mm & 180mm (erect & inverted images) and sighting tube (82mm). Case contains manuscript list of contents, bequeathed by S. Radford, June 1900.

Details

Category:
Navigation
Object Number:
1900-174
Materials:
brass, wood, glass
type:
sextant
taxonomy:
  • furnishing and equipment
  • measuring device - instrument
credit:
Dr. W T Radford
status:
Permanent collection

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