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    Re: Slide rule for lunars?
    From: Frank Reed
    Date: 2016 Apr 3, 15:24 -0700

    After a bit of reflection, I think I'll hedge my bet. Rather than being Thomson's "longitude scale", I suspect that this was yet another "invention" -- yet another attempt by Thomson to add a "scale," or what we know today as a "slide rule," to the process of clearing lunars. Nevertheless, it was apparently unsuccessful in the marketplace. Navigators liked tables and columns of numbers back then. Logarithms were not the enemy. :)

    Frank Reed

       
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