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    Re: Bob Goethe's Mark 2 Navigators slide rule, test drive comparisons.
    From: Sean Johnston
    Date: 2019 Nov 18, 14:56 -0600
    1. No. It is a simplex design, where all the scales are on one side. I think most of the rules that had scales on both sides of the slide were more generalized. Since Bob’s configuration is pretty specialized, it wouldn’t make sense to have to pull out the slide and flip it over during calculations. Of course additional scales could be added on the back of the slide, but then you'd have to make it even thicker and it’s already nearly a half inch(12mm) thick. 

    On Nov 16, 2019, at 10:16 PM, Herman Dekker <NoReply_Dekker@fer3.com> wrote:

    Hello Sean,

    Nice slightrule design.

    Question 1: Are there scales on the backside of the middle slider? As "normal" slightrules have?
    Question 2: what is a "day-timer"?  I (from Europe) do not not this size? name? use?

    HermanD N 52° E 04°

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