Octant
Octant
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- Description
- This octant, which dates from the late eighteenth century, belonged to the College of the Holy Cross in Worcester, Ma. It has an ebony frame, and flat brass index arm with floral design. The ivory scale is graduated every 20 minutes from -5° to +95° and read by vernier with tangent screw to 2 minutes of arc. There is also a back sight and a back horizon glass that can be used to measure angles greater than 90°.
- Location
- Currently not on view
- Object Name
- octant
- Measurements
- radius: 17 3/4 in; 45.085 cm
- overall: 3 in x 16 1/8 in x 19 3/16 in; 7.62 cm x 40.9575 cm x 48.73625 cm
- ID Number
- PH.326931
- catalog number
- 326931
- accession number
- 264083
- Credit Line
- College of the Holy Cross
- See more items in
- Medicine and Science: Physical Sciences
- Measuring & Mapping
- Navigation
- Data Source
- National Museum of American History
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