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    Re: Lunar distance accuracy
    From: Michael Daly
    Date: 2007 Oct 24, 18:16 -0400

    George Huxtable wrote:
    
    > White uses a Troughton "pillar-sextant" from the early 1800s. That term has
    > been used elsewhere in two different contexts.
    >
    [...]
    > Otherwise (and this is the meaning that seems to be relevant here) it's a
    > sextant firmly mounted on a pillar stand, for use on land, not at sea. It is
    > usually arranged so that the whole sextant can be easily rotated about a
    > polar axis, parallel with that of the Earth, just as a telescope can.
    
    This should be called an equatorially-mounted sextant.  With FRAS after
    his name (Fellow of the Royal Astronomical Society), he would likely
    have used this term or something very similar.  This would lead me to
    expect 'pillar sextant' to mean 'double-frame sextant'.
    
    Mike
    
    
    
    
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