John Fillmore Hayford

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John Fillmore Hayford
John Fillmore Hayford.JPG
John Fillmore Hayford
Born May 19, 1868
Rouses Point, New York
Died March 10, 1925 (1925-03-11) (aged 56)
Evanston, Illinois
Citizenship United States
Nationality United States
Fields geodesy
Institutions United States Coast and Geodetic Survey; Northwestern University, College of Engineering
Alma mater Cornell University College of Engineering
Known for isostasy
Notable awards Honorary doctorate from George Washington University 1918; Victoria Medal of the Royal Geographical Society 1924

John Fillmore Hayford (May 19, 1868 – March 10, 1925) was an eminent United States geodesist. His work involved the study of isostasy and the construction of a reference ellipsoid for approximating the figure of the Earth. The crater Hayford on the far side of the Moon is named after him.[1] Mount Hayford, a 1,871 m mountain peak near Metlakatla, Alaska, United States, is named after him.[2] A biography of Hayford may be found in the Biographical Memoirs of the National Academy of Sciences, 16 (5), 1935.

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