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.
Mount Hayford, a 1,871 m mountain peak near Metlakatla, Alaska, United States, is named after him.
A biography of Hayford may be found in the Biographical Memoirs of the National Academy of Sciences, 16 (5), 1935.
Read more about John Fillmore Hayford: Bibliography
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