Have you seen these? http://www.extremeinstability.com/04-11-8.htm

Nancree wrote:
> Thanks to Jerry Akins, here is corrected site for Aurora photo:
>
> http://antwrp.gsfc.nasa.gov/apod/ap041117.html
>
>
> Nancree

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Sharpening Made Easy: A Primer on Sharpening Knives and Other Edged
Tools by Steve Bottorff
Copyright January 2002 Knife World Publications
www.sharpeningmadeeasy.com