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    Re: Wires, back sights and collimation
    From: Alexandre Eremenko
    Date: 2004 Nov 25, 21:36 -0500

    Dear George,
    Apparently you were confused (there are so many messages:-)
    My correction Wed Nov 24 2004 - 14:23:29 EST
    refers to my message Wed Nov 24 2004 - 13:57:13 EST
    entitled "Altitudes close to 90".
    It does not apply to the earlier message
    Wed Nov 24 2004 - 13:12:24 EST
    entitled "Wires, back sights and collimation".
    However, as I understand now, one
    sentence in the message
    "Wires, back sights and collimation" was also incorrect.
    This is the sentence that
    "The same argument applies to Blish prizm and George's
    self made periscope".
    But I think that the main part of that message,
    on "Hadley-Chauvenet formula" is correct, and
    I think that it DOES explain what was wrong with the
    On Fri, 26 Nov 2004, George Huxtable wrote:
    > Is he retracting his paragraph 2,
    > which shows "a big problem with measuring
    > distances close to 180 degrees"?
    No, I am not retracting this paragraph.
    I am retracting the other message concerning 90 degrees.

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