|Title||Letter from AT Kupffer, St Petersburg, to Sir Edward Sabine|
|Date||26 December 1849 / 6 January 1850|
|Description||Letter relates to Russian observatories (through Kupffer) providing observational data to the British, as part of co-operative investigations into the Earth's Magnetic Field.|
Sabine was at the forefront of this so-called "magnetic crusade".
Fellows associated with this archive
|NA5601||Kupffer; Adolph Theodor (1799 - 1865)||1799 - 1865|
|NA8279||Sabine; Sir; Edward (1788 - 1883)||1788 - 1883|