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Re: Eratosthenes and plumb bobs

Herbert H Gottlieb wrote:

New York City
(Where builders use plumb bobs without windshields)

At 22:15 6/5/01 -0400, Geoff Nunes responded:
But Ken lives in British Columbia where not only fierce storms but
probably also grizzly bears are a concern.

A couple of fellows called Lewis & Clark took a cross country camping
trip across the country to the coast from the river divide at St Louis
a while ago. They had the latest nav gear from London.
They used a windshielded artificial horizon with their sextant.
I can't recall if it was the mercury, molasses, or mineral oil version.
Can you?

brian whatcott <> Altus OK