Macdonald, John, 1759 - 1831 (Lieutenant Colonel Military Engineer)
Person
Found in 1 Collection or Record:
Item
John Macdonald on the position of the magnetic pole and finding longitude by magnetic variation, 1830-04-04
Item
Reference Code: GBR/0180/RGO 14/43: 549-567
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:
1830-04-04
Conditions Governing Access:
From the Management Group:
Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).