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    Re: Halley's lunar knowledge.
    From: Michael Daly
    Date: 2007 Nov 25, 11:41 -0500

    George Huxtable wrote:
    > In Navlist 3926, under threadname "Ted Gerrard's book", Mike Daly wrore-
    >
    > "Halley's method can only be as accurate as his lunar position knowledge.
    >   No one published tables at that time (as Maskelyne did after 1767).
    > There was the raw data that was coming out of Flamsteed's observations
    > and other observers that may have been accumulating data.  Newton and
    > Halley published Flamsteed's data without his permission in 1712 but
    > what Halley used in the 1699 timeframe I don't know offhand."
    >
    [...]
    > Anyway, the question arises; how did Halley predict Moon positions? There
    > were indeed tables published of the Moon, contrary to Mike Daly's claim
    > above, but these were nothing like as precise and detailed as Maskelyne
    > derived from Mayer in 1767. They dated back to Ptolemy! Intended for
    > astrologers, rather than astronomers.
    
    Exactly how is what I wrote contrary to what you write?  There was no
    Nautical Almanac of reduced lunar data but there was raw data on lunar
    position.  That's what I wrote and that's what you wrote.
    
    I don't know why you persist in misquoting or convoluting the meaning of
    my statements.  I wish you would stop, as it contributes nothing to the
    discussions.
    
    > Phil. Trans.vol. 12, no. 141 (1678), 1032-4
    http://www.journals.royalsoc.ac.uk/content/056171286722j535/fulltext.pdf
    
    Mike
    
    
    
    
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