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    Re: Thompson mapping Canada
    From: Geoffrey Kolbe
    Date: 2009 Nov 29, 16:25 +0000

    George wrote [NavList 10848]:
    
    >Anyone interested in the work of those surveyors should take a look at two
    >recent papers by Peter Broughton, who has done much work on the astronomical
    >history of Canada.
    >
    >"The Accuracy and Use of Sextants and Watches in Rupert's Land in the
    >1790s", in Annals of Science, vol 66 No 2, April 2009, 209-229
    >
    >"Astronomical Observations by Peter Fidler and Others in "Canada"
    >1790-1820", in JRASC (Journal of the Royal Astronomical Society of Canada)
    >August 2009, pages 141-152.
    
    List members may also want to look at the webpage "How David Thompson
    Navigated" by Jeff Gottfred http://www.northwestjournal.ca/dtnav.html
    
    Gottfred is obviously knowledgeable in mathematical astronomy and had
    dedicated himself to the study of Thompson. The result is a detailed
    investigation, explanation and assessment of Thompson, his skills and
    his methods. As George says, the work of early explorer/surveyors who
    broke new ground and mapped new countries is a large subject which
    has had little airing here, which is a pity.
    
    Geoffrey Kolbe
    
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