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    Re: leap seconds a navigational hazard, says expert
    From: Richard M Pisko
    Date: 2003 Aug 9, 23:33 -0600

    On Sat, 9 Aug 2003 13:37:34 -0700, Brooke Clarke wrote:
    >I made one of these by placing a metal plate at the lower end of a South
    >facing skylight and using a 3x5 card with a number of concentric
    >ellipses and a small hole at their center.  I just tracked the Sun's
    >image with the card and at exactly noon stopped and drive a small brad
    >nail into the hardwood floor.  After many years there would be more than
    >one nail for the same date because as we go through the 4 years of the
    >leap year cycle the timing is a little different.
    Thank you.  Got it now ... not all the details, but the general idea
    ... and will visit your referenced sites.  I read too much into your
    comment, and was thinking of 15 second accuracy at any daylight hour.
    A bit difficult, I thought.   :-)
    Did you sand the (copper or steel?) brads flush?
    Richard ...

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