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Bare Needle Type. Pocket compass Silver pocket compass with white enamel dial. Inside the back is the happ mark 1772. Inn original sharkskin case.Besides the usual 32 points, the card is graduated quadrantally. The sliding locking device beneath the handl
1772
National Maritime Museum

Dip circle. Dip circle or dipping needle, made of brass with gold pivots encased in copper. The needle is 12 inches (30.5 cm) long, and the circular scale is graduated quadrantally to 30 minutes. A dip circle measures the vertical component of the earth&
1772
National Maritime Museum

. Barometer tube mounted in a wooden support.
1772-4
National Maritime Museum

. Label text in note book field. The glass tube is marked NAV0790.1 and can be found via the Whole/Part toggle. Domestic cistern barometer in mahogany frame. Brass scale. Width 4" (10.2 cm)
1772-4
National Maritime Museum

. The octant has a mahogany frame and limb with a brass index arm, and fittings. The back of the limb is also brass-covered and there is a wooden pad-shaped handle on the back of the frame. The clamping screw and tangent screw, which are both missing, are
circa 1772
National Maritime Museum