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    Re: Jack Aubrey's fixing of longitude
    From: Tom Sult
    Date: 2011 Jun 19, 14:22 -0500

    So aren't these books novels. Is it possible that the number 274 is just 
    literary License. Or is it truly historical?
    Thomas A. Sult, MD
    Sent from iPhone
    On Jun 19, 2011, at 11:01, Michael Dorl  wrote:
    >> Yes perhaps, but from the description of, "the moon, with Venus clear above 
    her," it sounds as though Venus was conjunct the moon - or very nearly so. So 
    what does the measurement, "Two seven four," signify?
    >> It might have been an occultation of Venus. As the Surprise was at a 
    latitude of about 15 degrees South at the time, the moon may well appear to 
    be travelling vertically up to an occultation with Venus. But again, what 
    does the measurement, "Two seven four," signify?
    > What year are we talking about?
    > There was a venus occultation 12 april 1785.
    > 1805 would be a better year; Lewis & Clark tried to establish longitude from 
    a lunar eclipse that year Jan 14/15.

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