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    Re: Bris does not work
    From: Andrés Ruiz
    Date: 2012 Jul 26, 19:39 +0200
    Alex:
    But with all my physics background (limited to what I was taught in
    high school) I cannot imagine how a dark glass could increase its darkness
    with age:-)

    I do not know what kind of filter has the original Bris sextant, but some that has salts or nitrates with the time comes more oxidized.
       
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