- 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
- Data Source
- National Museum of American History
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.