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Great Ramsden Theodolite, 18th century

Great Ramsden Theodolite, 18th century

C009/5240

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Credit

ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY

Caption

Great Ramsden Theodolite. This surveying device was built over a period of three years (1782-1785) by the British instrument maker Jesse Ramsden (1735-1800). It was used in the original surveying of the UK that led to the establishment of the Ordnance Survey. This artwork is from a 1799 report by Mudge and Dalby for the UK's Board of Ordnance. This report covered the years 1784-1796 of the survey being carried out in England and Wales. The theodolite was 91 centimetres across at the base, and is here mounted on a support structure.

Release details

Model release not required. Property release not required.

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