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

1829

Diamond- pattern frame sextant.

1835-1845

Double sounding quintant.

1835-1845

Box type pocket sextant.

1845-1850

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

1826

Diamond-frame pattern sounding quintant.

1885-1895

Altazimuth theodolite

1826-1916

Brass clinometer

Eccentric wire-gauge

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

1844-1850

Two foot

Standard yard, in mahogany case

Brass dynameter

1790-1890

Two foot geodetic theodolite, 1826-1828

1826-1828

frame micrometer

1826-1894

Portable transit instrument, with case and components

1840-1860

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

1829

Circular slide rule by Troughton and Simms

1877

28 inch level, by Troughton and Simms, with case

1801-1831

Prismatic magnetic compass, British, 1826-1876

1826-1876

Cyclograph for setting out railway curves, British, 1849

1849

Station pointer

1911

Brass pillar-frame sextant.

1826-1870

Bearing compass

Station pointer

1851-1900

6 inch station pointer by Troughton and Simms

1801-1900

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

1894

Royal Society standard thermometer, 1826-1832

1826-1832

Velvet-lined burgandy leather box for dynameter with handwriten note

1790-1890

Split-lens eyepiece micrometer

1870-1874

Cambridge Observatory eight-foot mural circle

1832

Meirs type reflecting goniometer with complete adjustment

1893

Altazimuth theodolite

1826-1916

Box of wooden drawing curves by Troughton & Simms

1839-1915

Incomplete portable transit instrument by Troughton and Simms

1826-1851

Wooden brass measure

1871-1873

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

1844-1850

Frame micrometer no. 30 by Troughton and Simms

1826-1894

Brass standard 4 feet, in mahogany case

1826

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

1869

Reflecting goniometer by Troughton and Simms

1901-1930

Two foot

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)
Surveyor's level, 23-inch (without tripod stand), by Troughton & Simms, London, England, 1841. Fitted with 12-inch alcohol bubble level, magnetic compass and filar micrometer. Used for 1st order levelling

Surveying level, British, 1841t, with accessories

1841
18-inch level used for levelling second order lines, Troughton & Simms, London, England, 1826-66.

Surveying level, British, 1826-1866

1826-1866
12-inch level by Troughton and Simms. With tripod.

12-inch level by Troughton and Simms. With tripod

1801-1900
6 inch transit theodolite by Troughton and Simms, mid 19th century, sectioned

6 inch transit theodolite by Troughton and Simms

1801-1900
Transit theodolite, 6-inch, with magnetic compass, by Troughton & Simms, Fleet Street, London, England, 1826-1850

Transit theodolite, British, 1826-1850

1826-1850
Horizontal optical comparator made by Troughton and Simms: 1940-1945

Horizontal optical comparator

1940-1945