Citations
Halley's magnetic chart as reprinted in 1870, 1870, GBR/0180/RGO 101/5/5, Tube 120: RGO 101/5/3-5. Cambridge University Library. |
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Halley's magnetic chart as reprinted in 1870, 1870, GBR/0180/RGO 101/5/5, Tube 120: RGO 101/5/3-5. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/1489882 Accessed March 16, 2025. |