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    Re: Perpendicularity again. was: Adjusting Central Mirror
    From: Alexandre Eremenko
    Date: 2004 Oct 11, 22:45 -0500

    Dear Michael:
    
    On Mon, 11 Oct 2004, Michael Dorl wrote:
    
    > Mine matches top to bottom.
    
    What sextant did you use in this experiment (I mean what is the
    size of the index mirror), and what was the approximate distance
    between your eye and the index mirror?
    
    Alex.
    
    
    

       
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