geodetic theodolite by Ramsden
18 inch geodetic theodolite by Ramsden, late 18th century
- Object Number:
- 1981-111 Pt1
- type:
- theodolite
18 inch geodetic theodolite by Ramsden, late 18th century
The theodolite, a surveying instrument used for measuring horizontal and vertical angles with a rotating telescope, measures an angle sufficiently accurately for the effect of the curvature of the earth's surface to be taken into account. This example was built by English instrument maker Jesse Ramsden (1735-1800).
Details
- Category:
- Surveying
- Collection:
- Sir Henry Wellcome's Museum Collection
- Object Number:
- 1981-111
- type:
- geodetic theodolites
- credit:
- On loan from the Wellcome Trust
