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    Re: Scrap paper with time sights c.1870
    From: Patrick Goold
    Date: 2013 Feb 21, 12:16 -0500
    Wow!  




    On Thu, Feb 21, 2013 at 11:46 AM, Lars Bergman <lars.h.bergman@gmail.com> wrote:

    I have looked at the top left reduction only, as a start. My conclusions:

    It is a 9 am sight of sun, lower limb, height of eye 17 feet.
    December 27th, 1871 at GMT 11h51m55s civil time.
    Latitude 36d37m north, longitude 42d38m west.
    Chronometer 3m52s fast on GMT.
    The nautical table used did not contain log sine square half angle.

    The declination gives two possible dates but together with equation of time one of them can be dropped. I haven't been able to get a perfect match with dec and EoT using Frank's on-line almanac, but above date and year seems to be the closest. I get a 2 seconds diff on the EoT, however.

    Further investigations may reveal whether the vessel was bound to or from Boston.

    Lars 59N 18E


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