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    Re: Lost people DO follow circles, says research
    From: James N Wilson
    Date: 2009 Aug 21, 20:17 -0700

    This somehow reminds me of learning some years ago about an ancient
    method to maintain orientation while crossing the Gobi desert. Primitive
    bevel gears were somehow used on a cart to maintain the orientation of a
    statue on a vertical axis. As long as both wheels rotated the same
    amount, the statue pointed straight ahead. But if one rotated more than
    the other, the statue pointed in a different direction, indicating that
    the cart had turned.
    
    Alas, I can't find anything about this now, and my old references have
    been lost. But it is interesting, even if I can't now figure out how it
    was done. I do remember that it was ingeniously simple.
    
    I'm remembering a bit more. This was offered to me as the first use of
    the bevel gear principle, and it was before the internet, so what I saw
    was hard copy. I wish I had it now.
    
    Jim Wilson
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