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Edmond Halley | 
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- An Account of the cause of the Change of the Variation of the Magnetic Needle; with an Hypothesis of the Structure of the Internal Parts of the Earth: it was proposed to the Royal Society in one of their late Meetings. By Edm. Halley, in: vol. 13 (1686/92), p. 563-578.
- A Theory of the Variation of the Magnetical COMPASS, by Mr. Ed. Halley, in: PhTr, vol. 16 (1686-1692), p. 208-221.
Exemplar: digital //
Exzerpt siehe: [Philosophical Transactions]
Datum: 15.05.2017