Letter, 'Observations of the diurnal variation of the magnetic needle at Fort Marlborough, Sumatra' from John MacDonald to John Crisp

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

Please cite as “RS-LP-001705,” in Ɛpsilon: Royal Society accessed on 5 June 2025, https://epsilon.ac.uk/view/epsilon-testbed/royal-society/letters/RS-LP-001705