Screw and nut associated with the 3-foot geodetic theodolite

Screw and nut associated with the 3-foot geodetic theodolite

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Screw and nut associated with the 3-foot geodetic theodolite
Science Museum Group
© The Board of Trustees of the Science Museum

Screw and nut. Part of the three-foot geodetic theodolite, sometimes called the ‘great Theodolite’, used for the Principal Triangulation of Great Britain. Made by Jesse Ramsden, Piccadilly, London, 1791. In crystal box

Details

Category:
Surveying
Object Number:
1876-1203/9
Materials:
brass (copper, zinc alloy)
type:
screw
credit:
Ordnance Survey