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    Re: False Horizons
    From: Mike L
    Date: 2007 Nov 20, 09:02 -0800

    > Perhaps making a simple quadrant would do for the kids and instead of
    > using two visors to look through you could make one with one small open
    > visor and a larger closed one to cast the smaller visor's shadow onto
    > the larger (so they do not have to look at the sun). After that exercise
    > you can explain that a sextant does a similar job using two mirrors.
    >
    Nicol�s,
    
    The principle sounds a good one for younger children and if the sun
    ever shines, I'll try out what I think you mean to see how accurate it
    is. But it would help if I understood what you meant by a "closed
    visor".
    
    Mike
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