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    Re: Artificial horizon
    From: Alexandre Eremenko
    Date: 2005 Feb 20, 13:31 -0500

    Bills and George,,
    > A highly polished black surface
    > (like a clean new black car) will want to
    > absorb all visible wave lengths by virtue of being black,
    > but actually acts
    > like a mirror because of the polished surface,
    Does not blue or red clean new car act the same way?
    > Note at least one sextant handbook suggests you can breath
    > life back into a dead rear-silvered sextant mirror
    > by painting the back
    > black.
    I mentioned this book in the P.S. of my message to which
    you are replying. I understand why he recommends this and
    I think this is a different situation from what we have in
    art horizons.
    On another suggestion, to use black tea,
    it should have the same problems as water I used:
    too liquid, too much disturbed by vibration.
    A more viscous liquid should be more appropriate
    (unless you have a really solid foundation like a concrete

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