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    Re: Mercury AH in aircraft sextants?
    From: David Pike
    Date: 2018 May 8, 09:28 -0700

    Tony you wrote:

    Were there any aircraft sextants with mercury-filled vials for artificial horizon?

    If there were not - why?

    No doubt such a system could be arranged with a suitable system of mirrors, but generally there’s a requirement for light to pass through the bubble chamber or vial, and mercury of course is opaque.  DaveP

       
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