Add to Lightbox Add to Lightbox Buy Image Buy Image

This image is protected by copyright law. Please contact us for advice on our licensing terms, before reproducing it for commercial purposes.

To save a small version of this image for mock-up or research purposes, right click (or control click on Macintosh) and Save Picture As...

100 link steel surveying chain, 1784.

Made by Jesse Ramsden, this chain was used in the Primary Triangulation of Great Britain. This was a network of measured triangles across the country, used to underpin maps. The network was checked in a number of places by setting up a base line, several miles long, and comparing measured and calculated dimensions. The first line was on Hounslow Heath and General William Roy of the Royal Engineers used this chain for its measurement.

Image No. 10280167 | This is a Rights Managed image.

Inventory No.: 1900-0156
Source No.: 1900-0156

Credit © Science Museum / Science & Society Picture Library -- All rights reserved.
Search for related items:
To search for related items, choose from the following related keywords. To search multiple keywords, select multiple checkboxes and click Search Selected. To search for a single keyword, click the keyword itself.
Show items that have: