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    Constructing A Logarithm Table
    From: Hewitt Schlereth
    Date: 2009 Jan 9, 21:11 -0400

    Hi All -
    
    I recently got a copy of Mike Pepperday's "S" table and liked several
    of it's features - a more discursive explanation than the usual from
    the government printing office; having a decimal point to keep the the
    logarithms aligned; the fact that he calls his logs "help numbers" I
    think shrewd - i find even seasoned sailors get queasy when they hear
    the 'L' word.
    
    Also liked that Pepperday followed Ageton and Dreisenstock in showing
    the divided triangle and the formulas. I've thought from the outset
    that the NAO table would be aided considerably by inclusion of a
    labeled drawing of the divided triangle.
    
    Since "S" is obviously a log table I thought it would be interesting
    to see what the base of the logs was. It isn't 10 and it isn't 2 and
    it isn't 'e'; seems to be 11.5, though I only checked at .5, 25, 30
    and 45 degrees.
    
    Doing this made me wonder how a log table is made. Do you have to slog
    by trial through 90 degrees 1' of arc at a time or is there another
    way?
    
    I figure someone in this forum will know how.
    
    Thanks, Hewitt
    
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