Re: bits for curved holes?

[David Scheidt <dmschei@attglobal.net>]

On Apr 3, 2004, at 9:52 AM, Eric J Russell wrote:

>
> ----- Original Message -----
>
>> There are also bits available to drill square holes.
>
>> Dave Russell
>
>    Of course you know that is true. Mortising bits.
>

No, really, there are bits to bore square holes.  See:

http://upper.us.edu/faculty/smith/reuleaux.htm

for a bit more mathematics in an explanation than I find necessary.  
The stuff the Watts brothers make is used by furniture makers.