| RefNo | MM/10/71 | 
| Level | Item | 
| Title | Letter from AT Kupffer, Dresden, to Sir Edward Sabine | 
| Date | 24 November 1863 | 
| 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". | 
| Language | French | 
| Extent | 3 sides | 
| Format | Manuscript | 
| AccessStatus | Open | 
Fellows associated with this archive
| Code | PersonName | Dates | 
| NA5601 | Kupffer; Adolph Theodor (1799 - 1865) | 1799 - 1865 | 
| NA8279 | Sabine; Sir; Edward (1788 - 1883) | 1788 - 1883 |