Spencer Browning & Co. Sextant
Spencer Browning & Co. Sextant
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- Description
- 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.
- Location
- Currently not on view
- Object Name
- sextant
- date made
- 1840-1870
- maker
- Spencer, Browning & Co.
- place made
- United Kingdom: England, London
- Physical Description
- ivory (overall material)
- brass (overall material)
- mahogany (overall material)
- glass (overall material)
- Measurements
- radius: 7 1/2 in; 19.05 cm
- 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
- ID Number
- 1981.0942.01
- catalog number
- 1981.0942.01
- accession number
- 1981.0942
- Credit Line
- George T. Blair
- See more items in
- Medicine and Science: Physical Sciences
- Measuring & Mapping
- Navigation
- Data Source
- National Museum of American History
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