Letter, 'Diurnal variation of the magnetic needle on the island of St Helena and Sumatra' from John MacDonald to Joseph Banks

The transcript of this letter is not available online on Ɛpsilon.

Please cite as “RS-LP-001723,” in Ɛpsilon: Royal Society accessed on 5 June 2025, https://epsilon.ac.uk/view/epsilon-testbed/royal-society/letters/RS-LP-001723