Daily Almanac for
May 25, 2012
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Dictionary


back' staff"




an obsolete instrument for determining the altitude of the sun by facing away from the sun, sighting upon the horizon, adjusting a cursor until its shadow falls upon the sight through which the horizon appears, and measuring the resulting arc.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

backstabbackstage
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