Octant made by Spencer, Browning & Rust, London

octant

INSTRUMENTS - OCTANTS
Thompson; Spencer, Browning & Rust
England, London
1784-1840
LOA 14-1/8 in.

Octant with ebony frame. Name plate ivory ".Thompson. 36 Wapping. London.". Limb ebony. Scale ivory, marked "SBR" in center, divided on a dividing engine of Spencer, Browning & Rust, London; graduated -2 deg. to 99 deg. by 1 deg. Index mirror with three adjustable shades. Horizon glass and shades. Sight vane double peep. Brass index arm with ivory vernier. Ivory knob atop pencil hole in brace. Empty note plate hole on back of frame. Given in memory of Anne Mason Colton.

1965.1004

Given in memory of Anne Mason Colton