Octant

octant

INSTRUMENTS - OCTANTS
Spencer, Browning & Rust
England, London
1784-1840
wood; metal; ivory; glass
overall: 17 1/2 x 14 1/2 x 2 5/8 in.

Octant, mahogany frame; ivory nameplate marked " * Spencer Browning & Rust London * ", SBR stamped in the scale (between 45°-50°); engraved ivory scale on limb graduated -2 deg. to 99 deg. by 1 deg. subdivided to 20'; flat brass index arm w/ivory vernier; adjustable index mirror w/3 removable shades; horizon glass w/lever adjustment & shades from index mirror; sight vane w/dbl peep & pivoted cover; back sight w. single peep; back horizon glass w/lever adjustment; pencil hole in brace (pencil missing); ivory note plate on back of frame; 2 screw holes through vertical brace.

1939.1362