Two foot geodetic theodolite, 1826-1828

Made:
1826-1828 in Fleet Street, England and London
maker:
Troughton and Simms Limited

Buy this image as a print 

License this image for commercial use at Science and Society Picture Library

Buy this image as a print 

License this image for commercial use at Science and Society Picture Library

Buy this image as a print 

License this image for commercial use at Science and Society Picture Library

Buy this image as a print 

License this image for commercial use at Science and Society Picture Library

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Two-foot geodetic theodolite with cast iron base and mahogany stand, by Troughton & Simms, London, England, 1826-28. Fitted with three bubble levels and eight reading microscopes. First used in 1828 for checking the Lough Foyle base. With separate parts.

This theodolite was made by Troughton and Simms and first used in 1828 for checking the Lough Foyle base, Northern Ireland. The theodolite was used for measuring both vertical and horizontal angles. This instrument was used for many years in conjunction with the Ramsden three foot geodetic theodolite in the preparation of the Primary Triangulation of Britain, the network of reference points underpinning Ordnance Survey maps.

Details

Category:
Surveying
Object Number:
1876-1204
type:
geodetic theodolite
taxonomy:
  • furnishing and equipment
  • measuring device - instrument
  • theodolite
credit:
Ordnance Survey

Cite this page

Rights

We encourage the use and reuse of our collection data.


Data in the title, made, maker and details fields are released under Creative Commons Zero


Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence

Using our data

Download

Download catalogue entry as json

Download manifest IIIF

Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.