Object Details
- Description
- Sextant with a double brass frame of the sort introduced by Edward Troughton in London in 1788. The silvered scale is graduated every 10 minutes from -5° to +155° and read by vernier with tangent screw and swinging magnifier to 10 seconds of arc. The "Riggs Brothers, Philadelphia" inscription came into use in 1865, and refers to a firm that sold instruments of this sort to American customers.
- Location
- Currently not on view
- ID Number
- 1989.0010.01
- catalog number
- 1989.0010.01
- accession number
- 1989.0010
- Object Name
- sextant
- Physical Description
- brass (overall material)
- glass (overall material)
- ebony (overall material)
- Measurements
- radius: 7 in; 17.78 cm
- overall in case: 5 1/4 in x 11 in x 10 1/2 in; 13.335 cm x 27.94 cm x 26.67 cm
- place sold
- United States: Pennsylvania, Philadelphia
- See more items in
- Medicine and Science: Physical Sciences
- Navigation
- Measuring & Mapping
- National Museum of American History
- Record ID
- nmah_1057583
- GUID (Link to Original Record)
- https://n2t.net/ark:/65665/ng49ca746a8-fc02-704b-e053-15f76fa0b4fa
