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    Re: Meridional Parts
    From: Robin Stuart
    Date: 2024 Dec 23, 06:23 -0800

    David,

    The attached paper gives the history of the calculation of meridional parts. The gudermannian function was apparently introduced by Johann Lambert in the 1760s although the name "gudermannian" came much later. Lambert, of course, devised a number of well-known map projections,

    Robin Stuart

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