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    Re: napier and logarithms
    From: Michael Dorl
    Date: 2009 May 28, 08:16 -0500

    corallina wrote:
    > I finished reading "The Story of Numbers" by John McLeish
    > chapter 12 is about Napier.  Unfortunately there is no mention
    > of Briggs.
    > On page 171 there is a description of how Napier calculated the logarithm
    > of 2.  He raised 2 to the power of 10,000 which comes out to a
    > number of 3011 places. He then subtract 1 from 3011 and gets 3010
    > which is the logarithm of two good to 4 decimal places.  log10(2) = 0.3010
    > I really don't understand why this works and hope somebody can
    > explain it?
    log (2**10000) = log ((10**0.30103)**10000) = log(10**3010.3)=3010.3
    I still recall my calculus teacher telling us how he remembers log 2.
    He thought of it as the ears, nose, and eyes of a face.  You have to
    reverse the right ear though.
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