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    Re: Chronometers
    From: Alexandre Eremenko
    Date: 2008 Mar 27, 14:28 -0400

    Paul, thanks.
    he relies only on astronomical means,
    and never mentions harbor time signals.
    Either he considers this too trivial to mention,
    or, perhaps
    they were not made in the US at that time.
    It is interesting when they started to make them:
    a) in Greenwich
    b) in most major harbors.
    In Greenwich, you can still see a big ball dropped
    from a spire on the observatory at noon, and perhaps
    many other harbors still have this.
    On Wed, 26 Mar 2008, Paul Hirose wrote:
    > In "The American Practical Lunarian" (1822), Thomas Arnold has a little
    > to say about chronometer rating.
    > http://books.google.com/books?id=SxhyUX4Do9oC&pg=PR7&dq=%22american+practical+navigator%22&as_brr=1
    > The links to pages are inaccurate; it's easier to navigate this book by
    > opening two browser windows or tabs. Use one for the table of contents
    > and use the other to go to a page by entering its number in the Go box.
    > --
    > I block messages that contain attachments or HTML.
    > >
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