Citations
John Tulloch on finding the longitude by the dipping needle and the variation chart, 1794, GBR/0180/RGO 14/42: 151-162. Cambridge University Library. |
|
John Tulloch on finding the longitude by the dipping needle and the variation chart, 1794, GBR/0180/RGO 14/42: 151-162. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/110199 Accessed June 14, 2024. |