Troughton & Simms Sextant

This sextant came from Princeton University, and was probably purchased for the John C. Green Astronomical Observatory that was established there in 1877. The frame is brass. The silvered scale is graduated every 10 minutes from -5° to +155° and read by vernier with tangent screw and magnifier to 10 seconds of arc. The inscriptions read "Troughton & Simms, London" and "Silver."
Currently not on view
Object Name
date made
Troughton & Simms
Physical Description
brass (overall material)
silver (overall material)
wood (overall material)
overall: 8 1/2 in x 11 1/2 in x 4 in; 21.59 cm x 29.21 cm x 10.16 cm
place made
United Kingdom: England, London
ID Number
catalog number
accession number
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Princeton University Observatory

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