Barrow, John, Sir, 1764 - 1848 (1st Baronet, Secretary of the Admiralty)
Found in 1 Collection or Record:
Account of Peter Barlow's experiments on board the ships 'Leven', 'Conway' and 'Griper' for correcting the local attraction of the vessels, 1819 - 1824
Reference Code: GBR/0180/RGO 14/43: 596-656
Scope and Contents From the File:
Correspondence regarding the effect of magnetic variation on the mariner's compass, the use of magnetic variation to establish longitude and the cause of magnetic variation.
Dates: 1819 - 1824
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