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    Re: Coordinates on Cook's maps
    From: Alexandre Eremenko
    Date: 2007 Apr 18, 12:58 -0400

    
    Ken,
    
    Many thanks for this useful information.
    Now I have all these almanacs and can compare
    them with Frank's online almanac on the dates
    of some Cook's observations.
    Then I will be able to tell what part of his error
    was due to the almanacs.
    
    Alex.
    
    On Wed, 18 Apr 2007, Ken Muldrew wrote:
    
    >
    >
    > On 18 Apr 2007 at 12:06, Alexandre E Eremenko wrote:
    >
    > > I think I have those almanacs
    > > (downloaded when this collection was still free).
    > > I just wanted to make sure that he
    > > used exactly the same published Nautical almanacs
    > > (rather than some more precise data his
    > > astronomers-associates could possibly provide).
    > > One thing which makes me doubt is this:
    > > Cook's voyages lasted more than one year.
    > > The ordinary almanac is published just one year ahead,
    > > even now. Then how did Cook obtain the data for
    > > more than one year?
    >
    > >From the paper "Tabulating the Heavens: Computing the Nautical Almanac in
    > 18th Century England" by M. Croarken, IEEE Annals of the History of
    > Computing 25(3): 48-61. 2003:
    >
    > "...on his first voyage of exploration (1768-1771), Captain Cook was able
    > to take with him only the Nautical Almanacs for 1768 and 1769, but on his
    > second voyage (1772-1775), he was able to take with him the editions for
    > 1772, 1773, 1774, and the few sheets from 1775 that were ready. By 1783,
    > the Nautical Almanac was regularly being published four or five years
    > ahead, and by 1793 the work was being completed up to 10 years ahead,
    > although publication was never more than five years ahead."
    >
    > Ken Muldrew.
    >
    > >
    
    
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