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Theodolite used for the Principal Triangulation of Great Britain
Main part of three-foot geodetic theodolite, sometimes called the ‘great Theodolite’, used for the Principal Triangulation of Great Britain. Made by Jesse Ramsden, Piccadilly, London, 1791.
Magnifying stereoscope, 1940
F-71 magnifying stereoscope, made by Fairchild Aviation Corporation, Jamaica, New York, United States, 1940
‘Trans-Pac’ GPS receiver, 1990-1991
‘Trans-Pac’ GPS, global positioning system receiver, made by Trimble Navigation, California, United States, 1990-1991. Retrieved from helicopter shot down in the Gulf War, 1991. Marked P/N 14992-00, S/N 3016A00570. Patented 4, 754, 465
Microptic transit theodolite, 1954
Microptic transit theodolite No 1, by Hilger & Watts Ltd, c. 1950 with box. (ex "Navigation Today" exhibition number: N.T.E. 122)
Part of Two foot geodetic theodolite, British, 1826-1828
Two-foot geodetic theodolite with cast iron base and mahogany stand, by Troughton and Simms, London, England, 1826-28. Fitted with three bubble levels and eight reading microscopes. First used in 1828 for checking the Lough Foyle base.
Pedometer by Spencer & Perkins
Pedometer or waywiser with fob hook, made by Spencer & Perkins, 1775-1794.
Combined graphometer and plummet clinometer, 1663.
Combined graphometer and plummet clinometer by Christoff Kohler of Dresden, 1663
Altazimuth theodolite by Benjamin Cole & Son, London, 1755-65. Without wooden tripod base.
Tripod for plane table outfit
Tripod for plane table outfit by W. & S. Jones, 30 Holborn, London, England, 1801-1830
Plane table board for plane table outfit
Plane table board for plane table outfit by W. & S. Jones, 30 Holborn, London, 1801-1830. Fitted with modern sheet of paper.
Alidade for plane table outfit
Alidade for plane table outfit by W. & S. Jones, 30 Holborn, London, England, 1801-1830
Tellurometer for EDM (Electronic Distance Measurement), 1957-1962
MRA 1 tellurometer set: master and remote instruments, accessories, c. 1960
Surveyor's pocket sextant.
Surveyor's pocket sextant made by William Cary, London, about 1800. Lacquered brass frame, polished limb, a detachable wooden handle. Signed on the crossbar: Cary London. Brass scale from -5° to 150° every 1°, measuring to 125° (digits read from the pivot). Brass vernier to 1', zero at the left. There is no tangent or clamping screw; no shades. Index glass without adjustment; adjustment of the horizon glass by a fixed milled screw. Sight vane with one pinhole. Wooden keystone box containing in the lid a label of the Geological Survey of Great Britain marked in MS: H.W. Bristow | 28 Jermyn Street | SW [and] agenda | 6747. Used for field mapping during the Peninsular War, 1808-1814.
Combined replica sleeve and original ball and socket for plane table outfit
Combined replica sleeve and original ball and socket for plane table outfit by W. & S. Jones, 30 Holborn, London, England, 1801-30.
'Sitesquare' optical square, British, 1959
'Sitesquare' optical square for laying out right angles, by Hilger & Watts Ltd, Debden, London, Essex, England,1959
Altazimuth theodolite, British, 1725-1747
Altazimuth theodolite, 4 1/2-inch, by Jonathan Sisson, Styrand, London, England, 1725-1747
Planimeter, by Stanley, Great Turnstile, Holborn,
Planimeter, by Stanley, Great Turnstile, Holborn, London, early 20th century, in fitted box, 29x5x4cm
Watkin type clinometer, British, 1895
Watkin type clinometer, cased, with extra spirit level, made by Elliott Brothers, Strand, London, England, 1895
"Ni 007" level, serial no.200690, by Carl Zeiss, J
"Ni 007" level, serial no.200690, by Carl Zeiss, Jena. Cased, circa 1970
Prismatic compass with bubble tube and small telescope, 1840-1863
Prismatic compass with bubble tube and small telescope, by Andrew Yeates, 12 Brighton Place, New Kent Road, London, 1832-1840. Inside lid engraved: 'Captain C. A. Hartley'.
Tachymeter-theodolite, "Theo 020", serial no.14655
Tachymeter-theodolite, "Theo 020", serial no.146557, by Carl Zeiss of Jena, in superb condition, c.1970
Tellurometer MICRODISTANCER by Tellurometer Ltd.
Tellurometer MICRODISTANCER by Tellurometer Ltd.
Altazimuth theodolite, British, 1816-1850
Altazimuth theodolite with spare lens cap, by Thomas Jones, Charing Cross, London, England, 1816-50.
Repeating Theodolite, Horizontal and vertical circles
Repeating Theodolite, Horizontal and vertical circles 14 & 12cm. respectively
Tapes measuring - repair outfit No.2, by James Che
Tapes measuring - repair outfit No.2, by James Chesterman and Co. Ltd., 1955. In fitted box 27 x 14 x 5cm
Surveying aneroid barometer, compensated, by Ellio
Surveying aneroid barometer, compensated, by Elliott Bros. of 101 St Martins Lane London, no.3156. In leather case marked W. Matthews, C.E. Early 20th century
Simple theodolite, Italian, 1676
Simple theodolite by Johannes Macarius of Modena, Italy, 1676
Angle iron to support levelling staff at bench mar
Angle iron to support levelling staff at bench mark, 1914
BRT 006 Basis-Reduktions-Tachymeter, in excellent
BRT 006 Basis-Reduktions-Tachymeter, in excellent condition, cased, by Carl Zeiss, Jena, circa 1976. Serial no.239834
Field clinometer, British, 1915
Field clinometer Mk III, by The Cambridge Scientific Instrument Company Limited, 1915.
Bridges-Lee type phototheodolite, 1894-1896
Bridges-Lee type phototheodolite by J. Hicks, 8, 9 & 10 Hatton Garden, London, England, 1894-96.
Pocket aneroid barometer, British, 1871-1906
Pocket aneroid barometer, by L. Casella Holborn, London, in case supplied by Negretti Zambra, London England, 1871-1906
Sledge-meter used on the Terra Nova Expedition, 1900-1910
snow sledge odometer, patented, No.25318, by S. Smith & Son Ltd., 9 Strand, London, England 1900-1910. Used with the British Terra Nova Antarctic Expedition, 1910-1913.
5-inch transit theodolite, no.31794, by E.R. Watts
5-inch transit theodolite, no.31794, by E.R. Watts and Son Ltd. London, 1944. Complete, in fitted box, 40 x 20 x 18cm, with tripod
Prismatic surveying compass by W. F. Stanley & Co.
Prismatic surveying compass by W. F. Stanley & Co. Ltd., London, in leather case marked W. Matthews, C.E., early 20th century
Road tracer type level with target, British, 1923-1927
Road tracer type surveying level and target, Ceylon pattern, by E.R. Watts and Son, London, England, 1923-1927
Combined level & clinometer, German, 1755
Combined plummet level and clinometer by Jacob Kranewetter, Germany (?), 1755.
Prismatic compass, 1851-1856
Prismatic magnetic compass by Newton & Co., London, mid 19th century
Box type pocket sextant.
Pocket box sextant made by the company of William Cary, Strand, City of Westminster, London, England, 1845-1855. Consists of two circular lacquered brass plates with lid that acts as a handle when used. Fitted with Inlaid silver 135° scale (-5° to 145°) with 30' divisions and a silver vernier (1' div.). The index arm is rotated by a milled knob on the upper plate with two filter shades (red & green) operated by lever. The index glass is fixed with adjustment for the horizon glass. Fitted with magnifier (single lens) on hinged 45 mm swivel arm, 50mm telescope and choice of a large and a small pinhole.
Surveyor's level, German, 1926-1929
Surveying Level Model No. IV, Serial No.No. 17328, by Carl Zeiss Jena, Germany (supplied by Carl Zeiss (London) Ltd.), 1926-1929.
50-Foot tape measure with notebook, British, 1846-1860
Linen measuring tape, 50-foot, with notebook and pencil in leather case, by J. Parkes & Son, Birmingham, England, 1846-1860. Inscribed on punched leather 'J.PARKES & SON/ [Royal Coat of Arms] /REGISTERED/FEBY 14TH 1846/SOLID - LEATHER/50 Ft.'
Italian off-set circumferentor, 1601-1700
Circumferentor ("ipodimeter") with eccentric alidade, Italian, 17th century
Improved Patent Portable Theodolite
Improved Patent Portable Theodolite, consisting of prismatic compass, telescopic sight and level by C. A. Schmalcalder, 82 Strand, London, England, 1818-1826.
Groma, roughly made, found in Fayum Province of Egypt, 1st to 2nd century BCE
Surveying quadrant, 1674.
Surveying quadrant with sights, plotting scales and gunnery scale on the obverse, by J. Lusuerg, Rome, 1674