"An upper limit for the distance a line tangent to the surface of an Earth-like sphere lies above the surface 30 miles away from the tangent point is 600 ft...."
Correction: lower limit.
(It's a good thing Merv gave me credit for getting Crater Lake in the right state!)
Don
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Received on Sat Aug 23 07:30:50 2008
This archive was generated by hypermail 2.1.8 : Sat Aug 23 2008 - 07:30:50 EDT