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

1829

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

1826

Double sounding quintant.

1835-1845

frame micrometer

1826-1894

Box type pocket sextant.

1845-1850

Eccentric wire-gauge

Standard yard, in mahogany case

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

1844-1850

Brass clinometer

Two foot

Brass dynameter

1790-1890

Diamond-frame pattern sounding quintant.

1885-1895

Diamond- pattern frame sextant.

1835-1845

Carrying case for diamond-frame pattern sounding quintant.

1885-1895

Circular slide rule by Troughton and Simms

1877

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

1829

Portable transit instrument, with case and components

1840-1860

Two foot geodetic theodolite, 1826-1828

1826-1828

Altazimuth theodolite

1826-1916

Bearing compass

Frame micrometer no. 30 by Troughton and Simms

1826-1894

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

1869

Wooden case for large Vernier Calliper, 1826-1867

1826

Royal Society standard thermometer, 1826-1832

1826-1832

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

1894

Incomplete portable transit instrument by Troughton and Simms

1826-1851

Brass standard 4 feet, in mahogany case

1826

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

1844-1850

Wooden brass measure

1871-1873

Box of wooden drawing curves by Troughton & Simms

1839-1915

Two foot

Cyclograph for setting out railway curves, British, 1849

1849

Prismatic magnetic compass, British, 1826-1876

1826-1876

Meirs type reflecting goniometer with complete adjustment

1893

6 inch station pointer by Troughton and Simms

1801-1900

Reflecting goniometer by Troughton and Simms

1901-1930

Velvet-lined burgandy leather box for dynameter with handwriten note

1790-1890

Split-lens eyepiece micrometer

1870-1874

Brass pillar-frame sextant.

1826-1870

Cambridge Observatory eight-foot mural circle

1832

Altazimuth theodolite

1826-1916

28 inch level, by Troughton and Simms, with case

1801-1831

Station pointer

1911

Station pointer

1851-1900
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)
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
Horizontal optical comparator made by Troughton and Simms: 1940-1945

Horizontal optical comparator

1940-1945
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
Tubular 5-foot standard scale by Troughton and Simms, with stand and wooden case (RAS No.13 & 95). Purchased by the Royal Astronomical Society in 1833.

Tubular 5-foot standard scale by Troughton and Simms

1833
The Commercial bronze standard of Imperial and Metric length, known as "CS", with its Comparing apparatus. Made by Troughton and Simms in 1869

bronze standard of Imperial and Metric length

1869