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Refracting telescope of 5.9-inch aperture, mounted on English type equatorial mounting with off-set lead counterweight

Refracting telescope of 5.9-inch aperture, mounted on English type equatorial mounting with off-set lead counterweight

1829
Portable transit instrument, with case and components

Portable transit instrument, with case and components

1840-1860
Two foot geodetic theodolite, 1826-1828

Two foot geodetic theodolite, 1826-1828

1826-1828
Prismatic magnetic compass, British, 1826-1876

Prismatic magnetic compass, British, 1826-1876

1826-1876
Box type pocket sextant.

Box type pocket sextant.

1845-1850
Cambridge Observatory eight-foot mural circle

Cambridge Observatory eight-foot mural circle

1832
Frame micrometer no. 30 by Troughton and Simms

Frame micrometer no. 30 by Troughton and Simms

1826-1894
Large Vernier Calliper for Manufacturing Large Calibre Weapons, 1826-1867

Large Vernier Calliper for Manufacturing Large Calibre Weapons, 1826-1867

1826
Brass pillar-frame sextant.

Brass pillar-frame sextant.

1826-1870
Altazimuth theodolite

Altazimuth theodolite

1826-1916
Circular slide rule by Troughton and Simms

Circular slide rule by Troughton and Simms

1877
Diamond- pattern frame sextant.

Diamond- pattern frame sextant.

1835-1845
Altazimuth theodolite

Altazimuth theodolite

1826-1916
Reflecting goniometer by Troughton and Simms

Reflecting goniometer by Troughton and Simms

1901-1930
28 inch level, by Troughton and Simms, with case

28 inch level, by Troughton and Simms, with case

1801-1831
frame micrometer

frame micrometer

1826-1894
Box of wooden drawing curves by Troughton & Simms

Box of wooden drawing curves by Troughton & Simms

1839-1915
Tutton's goniometer, for cutting, grinding and polishing minerals, with case and components

Tutton's goniometer, for cutting, grinding and polishing minerals, with case and components

1894
Royal Society standard thermometer, 1826-1832

Royal Society standard thermometer, 1826-1832

1826-1832
Split-lens eyepiece micrometer

Split-lens eyepiece micrometer

1870-1874
Bearing compass

Bearing compass

Brass clinometer

Brass clinometer

Station pointer

Station pointer

1911
Eccentric wire-gauge

Eccentric wire-gauge

6 inch station pointer by Troughton and Simms

6 inch station pointer by Troughton and Simms

1801-1900
Incomplete portable transit instrument by Troughton and Simms

Incomplete portable transit instrument by Troughton and Simms

1826-1851
bronze standard of Imperial and Metric length

bronze standard of Imperial and Metric length

1869
Diamond-frame pattern sounding quintant.

Diamond-frame pattern sounding quintant.

1885-1895
Meirs type reflecting goniometer with complete adjustment

Meirs type reflecting goniometer with complete adjustment

1893
Brass standard 4 feet, in mahogany case

Brass standard 4 feet, in mahogany case

1826
Station pointer

Station pointer

1851-1900
Cyclograph for setting out railway curves, British, 1849

Cyclograph for setting out railway curves, British, 1849

1849
Double sounding quintant.

Double sounding quintant.

1835-1845
Brass dynameter

Brass dynameter

1790-1890
Tubular 5-foot standard scale by Troughton and Simms

Tubular 5-foot standard scale by Troughton and Simms

1833
Standard yard, in mahogany case

Standard yard, in mahogany case

Velvet-lined burgandy leather box for dynameter with handwriten note

Velvet-lined burgandy leather box for dynameter with handwriten note

1790-1890
Apparatus for determining expansion of Standard Yard - Metre bars

Apparatus for determining expansion of Standard Yard - Metre bars

1844
Two foot

Two foot

Two foot

Two foot

Bronze 3" End-Measure No. 81, with agate plugs

Bronze 3" End-Measure No. 81, with agate plugs

1844-1850
Refracting telescope with 5.9-inch aperture lens, brass tube and English type equatorial mounting and clockwork drive

Refracting telescope with 5.9-inch aperture lens, brass tube and English type equatorial mounting and clockwork drive

1829
Bronze 6" End-Measure No. 80, with agate plugs

Bronze 6" End-Measure No. 80, with agate plugs

1844-1850
Wooden brass measure

Wooden brass measure

1871-1873
Folding clinometer, with conversion tables for gradient/angle and centigrade/F

Folding clinometer, with conversion tables for gradient/angle and centigrade/F

1869
Transit Telescope, 2-inch, brass, in fitted mahogany case, by Troughton & Simms, London, c1850, reputedly used at the London & North Western Railway's Crewe Works for aligning locomotive cylinders and frames.

Transit telescope by troughton & simms

1850
Theodolite, produced by Troughton & Simms, Great Western Railway, engraved GWR Divisional Engineers' Office, Gloucester no. 12, with box, tripod and two eye-pieces, repaired 1923.

Theodolite, Great Western Railway

1923 (repaired)
Refracting telescope of 4.1-inch aperture on an English type equatorial mounting commissioned by Sir George Shuckburgh from Jesse Ramsden in 1781, though not completed until 1791. First installed at Shuckburgh's home at Shuckburgh Warwickshire, it was later given to the Royal Observatory, Greenwich in 1811 by Charles Jenkinson Shuckburgh's heir. The hour circle was re-divided by Troughton & Simms in 1860 but the stand proved too flimsy and was little used at Greenwich in later years.

Refracting telescope on equatorial mounting

1781-1791
Everest type theodolite, 4-inch, by Troughton & Simms, London, England, 1875-1899

Everest type theodolite, British, 1875-1899

1875-1899
6 inch transit theodolite by Troughton and Simms, mid 19th century, sectioned

6 inch transit theodolite by Troughton and Simms

1801-1900