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    Re: Slide rules and cel nav
    From: Norm Goldblatt
    Date: 2015 Mar 23, 12:54 -0700

    What a fascinating thread. For kicks, google the 'Texas Magnum', a linear slide rule with 6 digit accuracy. Not sure if the applies to 9 thru 1, but the minimum separation of the lines is easily calculated, if we assume some reasonable line width.  (and visual acuity!) 

       
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