Octant probably made by Benjamin Brown, circa 1830-31

octant

INSTRUMENTS - OCTANTS
Brown, Benjamin
England, Bristol
1830-1831
wood; metal; ivory; glass
Overall (octant only): 15 3/4 x 12 3/4 x 2 7/8 in.

Octant with ebony frame, ivory nameplate marked, "* BROWN * BRISTOL", probably Benjamin Brown (w.1792-1831), dated 1830-31. Ebony limb. Ivory scale marked, "(foul anchor)", graduated -3 degrees to 98 degrees by 1 degree subdivided to 20'. Flat brass index arm. Ivory vernier. Adjustable index mirror with 3 fixed shades. Horizon glass with thumb screw and lever adjustment. Sight vane double peep. Note plate on back of frame missing; pencil hole in brace. Benj. Brown, 7 Quay, Bristol, England. Provenance: Capt. Jonathan Sheldon, 1870s.

1932.56