Results of the magnetic observations made by the Ordnance Survey in England and Wales in 1928 and preliminary results (declination only) of those made in Scotland in 1929

Results of the magnetic observations made by the Ordnance Survey in England and Wales in 1928 and preliminary results (declination only) of those made in Scotland in 1929 - London HMSO 1930 - 7p. 31cm.

Discusses declination, inclination and horizontal force as part of a magnetic survey.


United Kingdom--

522.11 $2 18