Azimuth compass. A compass with a rotatable ring-shaped brass frame around it mounted on a heavy brass stand. The frame is marked with degree scales. Four removable rectangular plates of brass, each with a rectangular hole, a slit and three small circular holes in them, project vertically from the frame equidistant from one another.

ABDNP:200369a

Azimuth compass in wooden box with lid and lock and key . Brass scales. 4 sights are detachable - 2 fit on rotating compass ring and 2 on meridional line. Each sight has a slit and a cross wire one above the other. Box has inset disc ' Univ. Abdn. Nat. Phil. ' The compass is calibrated 0°-360° in an anti-clockwise direction (steps are1.0°). The main azimuth scale has
an outer scale 0° - 360° in steps of 1° clockwise an adjoined scale 360° - 0° in steps of 0.5° anticlockwise an inner non-uniform scale - the sector has the same scale in 4 octants
with 0 at 45° and 315° positions with labeling 'shadow' near 0 marks. The S sector has 4 octants marked 0-10-0-10-0 starting at E with 0 at 90°, 180°, 270° points and 10 at 135° and 225° positions - divisions slightly closer nearer 10.

Dudley Adams, London

1790-1817

brass, glass, paper
175mm x 180mm x 65mm

Physical Object