Sextant
date: label: date made
content: 1840-1870
name: label: maker
content: Spencer, Browning & Co.
notes: label: Description
content: This sextant is somewhat unusual in that it has a brass frame, reinforced brass index arm, and ivory (rather than metal) scale. This scale is graduated every 20 minutes from -5° to +125° and read by vernier with tangent screw and swinging magnifier to 30 seconds of arc. The "Spencer Browning & Co., London" inscription on the arc refers to a firm that was in business from 1840 to 1870.
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
label: See more items in
content: Navigation
label: See more items in
content: Measuring & Mapping
creditLine: label: Credit Line
content: George T. Blair
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1981.0942.01
label: catalog number
content: 1981.0942.01
label: accession number
content: 1981.0942
objectType: label: Object Name
content: sextant
physicalDescription: label: Physical Description
content: ivory (overall material)
label: Physical Description
content: brass (overall material)
label: Physical Description
content: mahogany (overall material)
label: Physical Description
content: glass (overall material)
label: Measurements
content: radius: 7 1/2 in; 19.05 cm
label: Measurements
content: overall: 4 7/8 in x 11 1/2 in x 11 1/4 in; 12.3825 cm x 29.21 cm x 28.575 cm