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Marine chronometer by John Arnold and Son, 1787-1799

Time Measurement

1787-1799

Barograph clock by Alexander Cumming

Time Measurement

1766

Prototype beam splitter for the Advanced Laser Interferometer Gravitational Wave Observatory (aLIGO)

Astronomy

2008 (prototype)

Clock movement for Shelton regulator clock

Time Measurement

1768-1769

Celestial globe by George Adams

King George III

1766

Part of Two foot geodetic theodolite, British, 1826-1828

Surveying

1826-1828

Case for Shelton regulator clock

Time Measurement

1882

Azimuth mirror component

Navigation

1876-1879

Eyepiece, from Huygen's 210-Foot aerial telescope

Astronomy

1686-1691

Spherical glass lens for sunshine recorder, 1857

Meteorology

1857

Water volume measuring vessel

Gas Industry

Portable naked eye sighting instrument by George Adams

Astronomy

1780

Anemometer, Robinson type

Meteorology

Pocket watch winding key

Wellcome (general)

1853
Filar micrometer, part of refracting telescope by John Smeaton on equatorial mounting with stand [RAS No.7] . Presented to Royal Astronomical Society in 1845 by Mrs Sommerville to whom it was left by Mrs Dixon, Smeaton's daughter.

Filar micrometer, from John Smeaton's refracting telescope

Astronomy

1770

Gravity Probe B gyroscope rotor and housing

Space Technology

1992-1995

Set of eyepieces, for 6-inch aperture refracting telescope, in mahogany box

Astronomy

1884

Electrical register for anemometer

Meteorology

1872

Eyepiece, 6-inch focal length, from Huygen's aerial telescope

Astronomy

1686-1691

Sunshine recorder spherical lens, 1923

Meteorology

1923

German sunshine recorder base, 1944.

Meteorology

1944

Eyepiece, 10-inch focal length, from Huygen's aerial telescope

Astronomy

1686-1691

Eyepiece, 7 1/2-inch focal length, from Huygen's aerial telescope

Astronomy

1686-1691

Anemometer parts for use with 30 ft mast, 1997.

Meteorology

1997

Accessories for Alvan Clark telescope

Astronomy

1870-1880

Double-image crystal ocular micrometer, for Smythian telescope

Astronomy

1826

Complete set of smoked plattes

Oceanography

Chronometer watch movement

Time Measurement

Accessories for refracting telescope by Charles Tulley

Astronomy

1822

Two pairs of anemometer cups

Meteorology

1900-1930

Chronometer movement in brass cage

Time Measurement

1900-1910

Campbell sunshine recorder bowl, 1891

Meteorology

1891

Case, with accessories for Powell and Lealand No.1 microscope, 1874

Microscopes

1874

Divided object-glass micrometer by George Dollond

Astronomy

1821-1857

Four-part square section [screwed] 48-inch excise gauging rule by Joseph Long

Mathematics

1821-1846

Case for survey beacon, British, 1968-1979

Surveying

1968-1979

Nameplate for bench mark, British, 1914

Surveying

1914

Eyepiece cap and lens from telescope

King George III

1750-1850

Set of 4 anemometer cups, for Robinson anemometer.

Meteorology

1900-1930

Accessories for two-day chronometer by John Arnold and Son

Time Measurement
Two-day chronometer by John Arnold and Son, no.43/133. With inscription "Thos Prest August 10th 1792", scratched on great wheel, Prest was apprenticed to John Arnold and foreman to his son at Chigwell

Chronometer

Time Measurement

Concave Thorp grating for diffraction

Optics

Fragment of stem of unidentified instrument

Classical & Medieval Medicine

199-500

Case for 3-ft hand range-finder

Optics

1933-1939

Corner cube for geodimeter range-finder, Swedish, 1977

Surveying

1977

Accessories for Ramsden astronomical equatorial instrument

Astronomy

1770-1780

Dynamameter eyepiece micrometer

Astronomy

1820-1830

Divided object-lens micrometer by Peter Dollond for cassegrain reflecting Telescope of 2 1/2-inch aperture

Astronomy

1754-1757

Brass filar micrometer for astronomical telescope

Astronomy

1751-1773

Wooden box for Prof. William Thomson's fuel calorimeter

Heat

1886-1900