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It's interesting that Wimperis describes the Bygrave slide rule in
this book which was published in February, 1920 while Bygrave's patent
application is dated March 29, 1920, a month later.

gl

On Jul 6, 12:05�am, "Gary J. LaPook"  wrote:
> Attached is one more reference work that mentions the accuracy of the
> Bygrave.
>
> The flat Bygrave is just as accurate as the cylindrical one.
>
> gl
>
> glap...@PACBELL.NET wrote:
> > Attached are two more reference works mentioning the accuracy of the Bygrave.
>
> > Look at page 795 of NACA report 131
>
> > gl
> > Linked File:https://www.NavList.net/imgx/naca-report-131.pdf
>
>
>
> �Wimperis-Bygrave.pdf
> 306KViewDownload
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