Ordnance Survey: Trigonometrical and Levelling Divisions: Magnetic Surveys

OS 6
Ordnance Survey: Trigonometrical and Levelling Divisions: Magnetic Surveys

This series contains records of magnetic surveys undertaken by G W Walker and H L P Jolly. The records consist of three types of books:

  • Descriptions of stations, containing locating details for the magnetic survey stations.
  • Computation books, containing computations to find the geographical co-ordinates and azimuths for the magnetic survey stations.
  • Calculation books, containing calculations to obtain the magnetic variations of specific points in Great Britain.

Held by:
The National Archives, Kew
Legal status:
Public Record
Physical description:
12 volume(s)

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