Double sounding sextant.

Made:
1845-1851
modifier:
Nathaniel Worthington

Buy this image as a print 

License this image for commercial use at Science and Society Picture Library

Buy this image as a print 

License this image for commercial use at Science and Society Picture Library

Buy this image as a print 

License this image for commercial use at Science and Society Picture Library

Buy this image as a print 

License this image for commercial use at Science and Society Picture Library

Buy this image as a print 

License this image for commercial use at Science and Society Picture Library

Buy this image as a print 

License this image for commercial use at Science and Society Picture Library

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Double sounding sextant with anodized brass circle-pattern frame and polished brass limb with wooden handle in fitted mahogany box containing in the lid a trade label for J.D. Potter, 31 Poultry London, invented by Rear Admiral Frederick Beechey and made by Nathaniel Worthington, London, 1845-1851. Fitted with two parallel inlaid silver scales marked; (lower) -2° from left to155° with 20 arc-min. divisions to 129° and (upper) -10° at right to147° with same to 126°; each with silver vernier scale divided to 20 arc-min.; four index shades (3 red, 1 green), no horizon shades; two index glasses; upper magnifier (single lens) on a 55 mm swivelling arm and lower one on a bar and bracket for telescope (62 mm, large objective) erect image (other telescope missing) with perpendicular adjustment. Accessories include magnifying glass; adjusting key; adjusting pin.

Details

Category:
Surveying
Object Number:
1876-990
Materials:
brass (copper, zinc alloy), felt, glass, mahogany (wood), paper (fibre product) and steel (metal)
type:
sounding sextant
taxonomy:
  • furnishing and equipment
  • measuring device - instrument
  • furnishing and equipment
  • measuring device - instrument
  • sextant
credit:
Admiralty Hydrographic Department

Cite this page

Rights

We encourage the use and reuse of our collection data.


Data in the title, made, maker and details fields are released under Creative Commons Zero


Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence

Using our data

Download

Download catalogue entry as json

View manifest in IIIF viewer

Add to Animal Crossing Art Generator

Download manifest IIIF

Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.