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    Re: Correction to measuring Octant instrument error
    From: Bill Murdoch
    Date: 2000 Sep 21, 8:18 PM

    In a message dated 9/21/00 4:23:07 PM Eastern Daylight Time,
    george{at}HUXTABLE.U-NET.COM writes:
    
    > I do hope that Bill appreciates all the attention that his proposal is
    >  receiving. Whether or not he thinks the advice he is getting is appropriate
    >  to his plans, he has raised some intriguing general questions.
    
    I do very much appreciate it.  (And, it is a path I don't think the group has
    been down before.)
    
    While I have been quietly reading the posts, I have also been reading the
    "Wood Handbook" which has data for the thermal and moisture expansion
    coefficients of different species of wood.  Interestingly, wood has a lower
    thermal expansion coefficient in the longitudinal direction than plastics,
    aluminum, or brass and has little moisture expansion in the longitudinal
    direction.  In addition, if hotter is dryer they may cancel each other out.
    
    Bill Murdoch
    

       
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