[NSRCA-discussion] Slide Ruler,,,,was Art Wagner

[Ron Van Putte]

Gee.  I didn't know that aluminum had even been invented in 1946  
(yuck, yuck, yuck).

Ron VP

On Oct 14, 2008, at 6:09 PM, Nat Penton wrote:

> Interesting Duane.
> BTY, I purchased my slide rule in 1946. It has an aluminum frame.
>                           Nat
> ----- Original Message -----
> From: Duane Beck
> To: General pattern discussion
> Sent: Monday, October 13, 2008 2:59 PM
> Subject: Re: [NSRCA-discussion] Slide Ruler,,,,was Art Wagner
>
> Apparently, William Oughtred in the 1630's.
> http://en.wikipedia.org/wiki/Slide_ruler#History
> http://mysite.du.edu/~jcalvert/tech/slidrul.htm
>
> -------------- Original message --------------
> From: rcmaster199 at aol.com
>
> Anyone know who invented the thing??
>
>
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