Tripod signal with tin cone for reflecting sunlight

Tripod signal with tin cone for reflecting sunlight. At signal West Base, west end of Great Fire Island Base Line. Constructed by survey crews under direction of Ferdinand Hassler. Sketch by Assistant John Farley - view looking to east

Photo Category: Geodesy - Triangulation - Towers - Wooden
Photo Location: Fire Island, New York
Photo Date: 1837?

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Author: NOAA John Farley collection/ NOAA

License: Public Domain Mark 1.0 (Public domain)

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Added On	18th October 2015
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