Warren, M, fl1815 (petitioner to the Board of Longitude)
Found in 2 Collections and/or Records:
Letter concerning chronometers for HMS Spartiate under Captain Frederick Warren and HMS Windsor Castle under Captain Duncombe Pleydell Bouverie, 1828-10-02
Sent from John Barrow to John Pond.
M. Warren on a theory that the magnetic needle is held on its meridian by the laws of gravity only, 1815-06-30
Correspondence regarding the effects of magnetic variation on the mariner's compass, the use of magnetic variation to establish longitude and the cause of magnetic variation.