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    Re: Ah, give someone a calculator.......
    From: Marcel Tschudin
    Date: 2010 Aug 15, 21:03 +0300

    On Sun, Aug 15, 2010 at 8:24 PM, Gary LaPook  wrote:
    > (mercury barometers were the standard way to measure atmospheric pressure),
    Yes. But I was used to higher values measured in mm and not to such
    low "strange" values measured in inches. Well at one point I finally
    found it out ...
    You wrote:
    "Giving it some  more thought, since the maximum diameter of the earth
    is only 7926 SM, to be able to measure 8000 SM you would need to drill
    a hole through the center and out the opposite side and then have a
    satellite fly over the opposite opening at an altitude of 74 SM and
    shine a powerful light down through the hole so that you can see it
    from your side."
    Instead of putting such satellite in a circling orbit you just could
    drop it from a height of 74SM down the howl. Assuming no frictional
    losses you would have now a sort of pendulum satellite; the pendulum
    having a frequency corresponding to the time of revolution of a
    circling satellite.

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