Scope and Contents Papers relating to geodetic surveys, including a map and calculations of the British Isles showing trigonometrical bases; a printed 'Report of the progress of the Ordnance Survey and Topographical Depot, to the 31 December 1858'; a photograph of Lt. Colonel James R.E.; an extract from a printed work, including sections on the description of instruments used for the triangulation of Great Britain, the reduction of observations and the observations of the principal triangulations; a list of...

Scope and Contents Material concerning work on the geodetic surveys and longitudes in Britain, Europe and India. The papers include two maps of triangulations in Ireland (one on a smaller scale); a plan of principal triangles in Britain; a map of triangulations in Germany; a sketch of triangulations at Royston, Bedfordshire; calculations to find the latitude and longitude of Ben Lomond; triangulations in Scotland and on the Shetland Isles; disturbances of gravity of Shanklin Down, Isle of Wright, with a list...