The museum is open Fridays through Tuesdays 11 a.m. to 4 p.m. Free timed-entry passes are required. Review our latest visitor safety guidelines.

W. & S. Jones Sextant

W. & S. Jones Sextant

<< >>
Usage conditions apply
The double-framed brass sextant was patented by Edward Troughton in London in 1788, and the form remained popular throughout the first half of the 19th century. This example belonged to Haverford College in Pennsylvania and may have been acquired when that school was founded in 1833. It has a silvered scale that is graduated every 10 minutes from -5° to +145° and read by vernier with tangent screw and swinging magnifier. The inscription reads "W. & S. Jones Holborn London."
Ref: Edward Troughton, "Framing to be used in the construction of octants, sextants, and quadrants," British patent #1644.
Currently not on view
Object Name
date made
W. & S. Jones
place made
United Kingdom: England, London
box: 12 cm x 33.6 cm x 33.6305 cm; 4 23/32 in x 13 7/32 in x 13 1/4 in
overall: 10.8 cm x 28.3 cm x 28.3 cm; 4 1/4 in x 11 5/32 in x 11 5/32 in
overall in box: 4 3/4 in x 13 in x 12 1/2 in; 12.065 cm x 33.02 cm x 31.75 cm
ID Number
catalog number
accession number
Credit Line
Haverford College
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Data Source
National Museum of American History
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.


Add a comment about this object