'Account of Conical Appearances in the Heavens which seem to account for the Increase both of the Magnitude of the heavenly Bodies and their Distance from one another near the horizon' by William Derham

'Account of Conical Appearances in the Heavens which seem to account for the Increase both of the Magnitude of the heavenly Bodies and their Distance from one another near the horizon' by William Derham, 1711, RBO/9/105, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/rbo_9_105/account-of-conical-appearances-in-the-heavens-which-seem-to-account-for-the-increase-both-of-the-magnitude-of-the-heavenly-bodies-and-their-distance-from-one-another-near-the-horizon-by-william-derham, accessed on 21 March 2025

https://makingscience.royalsociety.org/items/rbo_9_105/account-of-conical-appearances-in-the-heavens-which-seem-to-account-for-the-increase-both-of-the-magnitude-of-the-heavenly-bodies-and-their-distance-from-one-another-near-the-horizon-by-william-derham

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