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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

Circular slide rule by Troughton and Simms

1877

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

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

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
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