Sextant
date: label: date made
content: 1800-1850
name: label: maker
content: W. & S. Jones
notes: label: Description
content: 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."
label: Description
content: Ref: Edward Troughton, "Framing to be used in the construction of octants, sextants, and quadrants," British patent #1644.
label: Location
content: Currently not on view
place: label: place made
content: United Kingdom: England, London
setName: label: See more items in
content: Medicine and Science: Physical Sciences
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content: Navigation
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content: Measuring & Mapping
creditLine: label: Credit Line
content: Haverford College
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1981.0745.06
label: catalog number
content: 1981.0745.06
label: accession number
content: 1981.0745
objectType: label: Object Name
content: Sextant
label: Object Name
content: sextant
physicalDescription: label: Measurements
content: 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
label: Measurements
content: 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
label: Measurements
content: 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