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Contact: Nanci Bompey
nbompey@agu.org
202-777-7524
American Geophysical Union

Sketch from a Hydrographic Survey Notebook in 1884

Caption: This sketch from a hydrographic survey notebook in 1884 shows the position of the Governors Island tide staff (labeled 'gauge') and the 'benchmark' 17 feet above the zero mark of the tide staff.

Credit: Stefan Talke

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