100 link steel surveying chain, 1784.

UNITED KINGDOM - SEPTEMBER 30: This 100 foot chain was made by Jesse Ramsden for use in the Primary Triangulation of Great Britain, the foundation for the first Ordnance Survey maps. It is shown with a plan showing the situation of the first measurement, a base line on Hounslow Heath measurement on Hounslow Heath (plate from 'Philosophical Transactions'). The first stage took place in the summer 1784, and was conducted by General William Roy (1726-1790) of the Royal Engineers. (Photo by SSPL/Getty Images)
UNITED KINGDOM - SEPTEMBER 30: This 100 foot chain was made by Jesse Ramsden for use in the Primary Triangulation of Great Britain, the foundation for the first Ordnance Survey maps. It is shown with a plan showing the situation of the first measurement, a base line on Hounslow Heath measurement on Hounslow Heath (plate from 'Philosophical Transactions'). The first stage took place in the summer 1784, and was conducted by General William Roy (1726-1790) of the Royal Engineers. (Photo by SSPL/Getty Images)
100 link steel surveying chain, 1784.
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Credit:
Science & Society Picture Library / Contributor
Editorial #:
90732023
Collection:
SSPL
Date created:
30 September, 1999
Upload date:
Licence type:
Rights-managed
Release info:
Not released. More information
Source:
SSPL
Object name:
10318736
Max file size:
3504 x 2766 px (29.67 x 23.42 cm) - 300 dpi - 3 MB