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Ferdinand Hassler directing movement of the Great Theodolite on Fire Island.
Angle measurements at the end points of the Fire Island Base Line.
Probably sketched by Assistant John Farley
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Image ID: theb1851, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Fire Island, New York
Photo Date: 1836
Credit: NOAA Photo Library, NOAA Central Library; NOAA Central Library
Category: Getting There/On Foot/
• High Resolution Photo Available
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