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    Pillar Sextant
    From: Fred Hebard
    Date: 2003 Apr 1, 12:38 -0500

    There is a very nice Troughton circular sextant with pillar on ebay.
    It was just listed about 1 pm pst yesterday, and has gone from $100 to
    $1575 with 17 bids by 9:30 am pst today.
    
    There are numerous pictures.
    
     From what I can tell looking at the vernier, the instrument appears
    capable of measuring to 20 seconds of arc by direct reading.
    Interpolation could lower that to 10 or 5 I suppose.  The text says 5
    seconds.  From the text, it appears the author knows what he's talking
    about, so I suppose 5 seconds is about right.
    
    Fred
    
    
    

       
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