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Balloon theodolite by Cary

J.S. Dines' original prototype recording theodolite

1910

Balloon theodolite by Cary

1938

Side-telescope transit theodolite, British, 1890-1900

1890-1900

Artificial mercury horizon with case.

1895-1900

Rectangular protractor for nautical use

1906

Brass framed sextant fitted with artificial horizon.

1914-1918

Gendle balloon balance, Met O 97. for pilot balloon, for Royal Navy Meteorological Service

Balloon theodolite by Cary

Balloon theodolite Mark D by Cary

1935

Balloon theodolite by Cary

1935
Liquid marching compass, by Cary, Porter Ltd., London. ACO - 127

Liquid marching compass

Pilot balloon theodolite by Cary & Co., London (incomplete)

Pilot balloon theodolite by Cary & Co.

Box for Balloon theodolite by Cary, Porter Ltd., London, 1940.

Box for Balloon theodolite by Cary

1940
Quintant made by John Dennett Potter, London, about 1885. Anodized brass diamond-pattern frame, wooden handle. Signed on the limb: J.D. Potter; Poultry & Tower Hill London. Marked at the bottom of the index arm: H O [broad arrow] 10. Inlaid silver scale from -5° to 163° every 10', measuring to 138°. Silver vernier to 10". The tangent screw and clamping screw are on the back of the index arm. Four shades (three grey, one green); three horizon shades (two grey, one green). Index-glass adjustment by screw; adjustment of the horizon glass by capstan screws and a square-headed screw and a detached key. Magnifier on a 90 mm swivelling arm, a frosted glass shade. Threaded telescope bracket in two parts, fitted for correcting collimation error; perpendicular adjustment by rising-piece and a milled knob. Telescope (82 mm) erect image; telescope (184 mm) inverted image, two parallel cross-wires; telescope (155 mm) star finder; extra draw tube (80 mm) inverted image, four cross-wires. Sight-tube (80 mm); three shaded eyepieces (all green); detached threaded telescope bracket for the star finder; adjusting key; adjusting pin. Mahogany keystone box, containing in the lid three certificates of examination of the National Physical Laboratory, for 1885, [illegible, stuck over] and for 1910. The lid also contains a trade label for Cary, Porter Ltd, and a Notice by them explaining how the star finder should be attached to the framed; it was an addition, made by Cary in April 1889. Formerly the property of the Hydrographic Office of the British Admiralty.

Diamond- pattern frame quintant with case.

1860-1889
Twelve inch station pointer by Cary, Porter Ltd. of London, c.1930s. In mahogany case. HO 24

Twelve inch station pointer by Cary

1931-1940
Mark VI Prismatic marching compass by Cary, London, in leather case. Some verdigris. With invoice dated 1912, includes no.3

Mark VI Prismatic marching compass by Cary

1912