Johnstone, Thomas, fl1803 - 1827 (petitioner to the Board of Longitude)
Person
Found in 1 Collection or Record:
Item
Thomas Johnstone on the change of the variations of the compass and discovery of the magnetic pole, 1822 - 1827
Item
Reference Code: GBR/0180/RGO 14/43: 394-400
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:
1822 - 1827
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).