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    The diagram on strip form
    From: Bob Goethe
    Date: 2018 Mar 2, 08:35 -0800

    In figure 1905 of Bowditch 2017, page 312, there is a strip form for use in sight reduction.  Towards the bottom of that form is a circle with a vertical line.

    What is the intended use of this diagram?

    Thanks,

    Bob

       
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