Tulloch, John, fl1788 - 1799 (schoolmaster)
Found in 6 Collections and/or Records:
John Tulloch on finding the longitude by the dipping needle and the variation chart, 1794
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.
Letter from John Tulloch to Sir Joseph Banks, 1788-12-06
Originally enclosing the paper at [RGO 14/45: 322-326].
Letter from John Tulloch to Sir Joseph Banks, 1789-05-08
Originally enclosing the paper at [RGO 14/45: 331-335].
Paper by John Tulloch on further methods of investigating celestial parallaxes, 1789-05-08
Two letters and two sets of proposals.
Paper on nautical discoveries by John Tulloch, 1788-12-06
The paper begins with a list of 'titles of discoveries' which Tulloch had submitted to the Board of Longitude on 29 February 1788, followed by an outline of methods for investigating the parallaxes of celestial bodies (with illustrations).
Petition from John Tulloch regarding improvements in navigation, 1799-12-07
Miscellaneous petitions and memorials making requests of the Board of Longitude.
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