| RGO Archives/RGO 6 contains: |
| <-- See earlier |
| 637 |
Papers on the galvanic longitude of Valentia |
| 638 |
Papers on determining galvanic longitudes |
| 639 |
Papers on determining galvanic longitudes |
| 640 |
Papers on determining galvanic longitudes |
| 641 |
Absolute measures of magnetic horizontal force |
| 642 |
Absolute measures of magnetic horizontal force |
| 643 |
Absolute measures of magnetic horizontal force |
| 644 |
Absolute measures of magnetic horizontal force |
| 645 |
Absolute measures of magnetic horizontal force |
| 646 |
Absolute measures of magnetic horizontal force |
| 647 |
Records of the magnetic theodolite |
| See later --> |