Survey tower with signal pole and tin cone.
At west end of Epping Base Line.
Survey monument shows below tower.
Stakes on graded surface were for aligning base measuring instruments
Image ID: theb2460, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Maine, Epping Plains
Photo Date: 1857
Credit: NOAA Central Library
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of the U.S. Department of Commerce, National Oceanic & Atmospheric
NOAA Central Library
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May 12, 2014