Telescope used by General Roy, Hounslow Heath, Middlesex, 1784.
2 6 c m
40cm
actual image size: 32cm x 18cm

Telescope used by General Roy, Hounslow Heath, Middlesex, 1784.

© Science Museum / Science & Society Picture Library

Description

Telescope used by General William Roy during the time he carried out his ground-breaking survey of Britain from 17for measuring base line to link Paris and Greenwich, with box. Collar engraved with inscription R S 53. The principal triangulation of Britain was a surveying project undertaken between 1787 and 1790 by General William Roy, to link the observatories of Greenwich and Paris, using theodolites made by Jese Ramsden (1735-1800). 'The Primary Triangulation of Great Britain' was a network of measured triangles acros the country, to underpin the first general survey of the country. The network was checked in a number of places by setting up a baseline, several miles long, and comparing measured and calculated dimensions. The first line was used on Hounslow Heath, London, in 1784 by General William Roy of the Royal Engineers.
 

Image Ref.

10279286
 

buy a print

Select size
 
Select finish
 
How many prints?
 
£20.00
 

buy a framed print

buy a canvas

buy a framed canvas