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    Re: Timing Lunars with a Rock
    From: Bruce Stark
    Date: 2005 Jul 18, 23:26 EDT
    This morning I posted a note saying the old nav. manuals recommended using a string-and-bullet pendulum to check the half-minute glass. I finished with the unthinking remark: " I suppose you had to give the pendulum a few moments to settle the length of its swing."

    That's nonsense, of course. I think it's true for clock pendulums, where the pendulum gets a push. But It seems to me a simple string-and-weight pendulum would swing a shorter distance each beat, while the time of each swing would remain the same. 

    Bruce
       
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