Description | Observations of the variation of the magnetic needle when sailing from the coast of Brazil by the Cape of Good Hope to Bantam [Banten, Java, Indonesia] in both 1607 and 1641. Captain Davis collected his data in 1607, Captain Mynors in 1641. Includes a short account of the magnetic variation.
Subject: Magnetism / Navigation Read to the Royal Society on 16 May 1666. |