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LicenseOctant sold by Thomas Flint, Hull, about 1840
Science Museum Group
© The Board of Trustees of the Science Museum
Ivory and ebony octant
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Octant sold by Thomas Flint, Hull, about 1840. Ebony frame and limb with a brass index arm and fittings; inlaid ivory plates on the crossbar and on the back of the frame. Marked on the inlaid plate on the crossbar: Flint * Hull. Inlaid ivory scale from -2° to 100° every 20', measuring to 90°. Ivory vernier to 1', zero at the right. The tangent screw and clamping screw are on the back of the index arm. Three shades (two red, one green). Index-glass adjustment by screw; adjustment of the horizon glass by a fixed milled screw, and a lever, worm gear, and a milled clamping screw. The sight vane has two pinholes and a swivelling shade (red). An ivory-capped pencil is fitted in the crossbar. No box.
Details
- Category:
- Navigation
- Object Number:
- 1890-31
- Materials:
- incomplete, ebony, ivory, brass (copper, zinc alloy), glass, mirror-glass (silvered) and paint
- Measurements:
-
overall: 305 mm x 244 mm x 73 mm, .87kg
- type:
- octant
- credit:
- Purcell-Taylor, C.
