pl23_theb2458.jpg
Description
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
Credit
NOAA John Farley collection
Display Date
1837?
Location
Fire Island, New York
Collection
Historic Coast & Geodetic Survey
Geodesy
Triangulation
Wooden Towers & Signal Poles
Keywords
Geodesy
Triangulation
Towers
Wooden