{{Short description|American geodesist (1868–1925)}} {{Infobox scientist | name = John Fillmore Hayford | image = John Fillmore Hayford.JPG | image_size = | caption = | birth_date = May 19, 1868 | birth_place = Rouses Point, New York | death_date = {{death-date and age|March 10, 1925|May 19, 1868}} | death_place = Evanston, Illinois, U.S. | field = Geodesy | work_institutions = United States Coast and Geodetic Survey; Northwestern University, College of Engineering | alma_mater = Cornell University College of Engineering | doctoral_advisor = | doctoral_students = | known_for = Isostasy | author_abbrev_bot = | author_abbrev_zoo = | influences = | influenced = | prizes = Honorary doctorate from George Washington University 1918; Victoria Medal of the Royal Geographical Society 1924 | footnotes = | children = 4, including Phyllis Hayford Hutchings | signature = }} '''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. Hayford was elected to the United States National Academy of Sciences in 1911 and the American Philosophical Society in 1915.<ref>{{Cite web |title=John Hayford |url=https://www.nasonline.org/member-directory/deceased-members/20001096.html |access-date=2023-11-01 |website=www.nasonline.org}}</ref><ref>{{Cite web |title=APS Member History |url=https://search.amphilsoc.org/memhist/search?creator=John+F.+Hayford&title=&subject=&subdiv=&mem=&year=&year-max=&dead=&keyword=&smode=advanced |access-date=2023-11-01 |website=search.amphilsoc.org}}</ref> The crater Hayford on the far side of the Moon is named after him.<ref>{{Cite web |url=https://planetarynames.wr.usgs.gov/jsp/FeatureTypesData2.jsp?systemID=3&bodyID=11&typeID=9&system=Earth&body=Moon&type=Crater,%20craters&sort=AName&show=Fname&show=Lat&show=Long&show=Diam&show=Stat&show=Orig |title=USGS-Gazetteer of Planetary Nomenclature |access-date=2009-04-01 |archive-url=https://web.archive.org/web/20100307113446/http://planetarynames.wr.usgs.gov/jsp/FeatureTypesData2.jsp?systemID=3&bodyID=11&typeID=9&system=Earth&body=Moon&type=Crater,%20craters&sort=AName&show=Fname&show=Lat&show=Long&show=Diam&show=Stat&show=Orig |archive-date=2010-03-07 |url-status=dead }}</ref> Mount Hayford, a 1,871&nbsp;m mountain peak near Metlakatla, Alaska, United States, is named after him.<ref>[http://www.mountainsmounts.com/mountain/30981/mount-hayford/ Mountains Mounts] {{webarchive|url=https://web.archive.org/web/20141223033838/http://www.mountainsmounts.com/mountain/30981/mount-hayford/ |date=2014-12-23 }}</ref> A biography of Hayford may be found in the Biographical Memoirs of the National Academy of Sciences, '''16''' (5), 1935.

==See also== *Hayford ellipsoid

==Bibliography== *{{Citation |pmid = 17795741 |last1=Hayford |publication-date=Apr 13, 1917 |year=1917 |title=Gravity and Isostasy. |volume=45 |issue=1163 |pages=350–354 |doi = 10.1126/science.45.1163.350 |journal = Science |first1 = JF |url=https://zenodo.org/record/1448187 }} *{{Citation |pmid = 17815861 |last1=Hayford |publication-date=Feb 10, 1911 |year=1911 |title=The American Association for the Advancement of Science the Relations of Isostasy to Geodesy, Geophysics and Geology. |volume=33 |issue=841 |pages=199–208 |doi = 10.1126/science.33.841.199 |journal = Science |first1 = JF |url=https://zenodo.org/record/1448052 }} *{{Citation |pmid = 17817509 |last1=Hayford |publication-date=Jun 4, 1909 |year=1909 |title=The New College of Engineering, an Opportunity. |volume=29 |issue=753 |pages=887–891 |doi = 10.1126/science.29.753.887 |journal = Science |first1 = JF |url=https://zenodo.org/record/1448018 }} *{{Citation |pmid = 17771974 |last1=Hayford |publication-date=Jan 11, 1907 |year=1907 |title=Report of the General Secretary. |volume=25 |issue=628 |periodical=Science |pages=46–50 |doi = 10.1126/science.25.628.46 |first1 = JF |doi-access=free }} *{{Citation |pmid = 17836523 |last1=Tittmann |last2=Hayford |first2=JF |publication-date=Dec 7, 1906 |year=1906 |title=The Budapest Conference of the International Geodetic Association. |volume=24 |issue=623 |pages=713–719 |doi = 10.1126/science.24.623.713 |journal = Science |first1 = OH |url=https://zenodo.org/record/1447974 }} *{{Citation |pmid = 17811031 |last1=Hayford |publication-date=Jul 13, 1906 |year=1906 |title=Report of the General Secretary. |volume=24 |issue=602 |pages=33–40 |doi = 10.1126/science.24.602.33 |journal = Science |first1 = JF |url=https://zenodo.org/record/1447962 |doi-access=free }} *{{Citation |pmid = 17789796 |last1=Hayford |publication-date=Apr 28, 1905 |year=1905 |title=A Connection by Precise Leveling Between the Atlantic and Pacific Oceans. |volume=21 |issue=539 |pages=673–674 |doi = 10.1126/science.21.539.673 |journal = Science |first1 = JF |url=https://zenodo.org/record/1447936 }} *{{Citation |pmid = 17812559 |last1=Hayford |publication-date=Nov 6, 1903 |year=1903 |title=The Longitude of Honolulu, Various Determinations, 1555-1903. |volume=18 |issue=462 |pages=589–593 |doi = 10.1126/science.18.462.589 |journal = Science |first1 = JF |url=https://zenodo.org/record/1447902 }} *{{Citation |pmid = 17808951 |last1=Hayford |publication-date=Apr 26, 1901 |year=1901 |title=A New Connection Between the Gravity Measures of Europe and of the United States. |volume=13 |issue=330 |pages=654–655 |doi = 10.1126/science.13.330.654 |journal = Science |first1 = JF |url=https://zenodo.org/record/1447842 }} *{{Citation |pmid = 17801118 |last1=Hayford |publication-date=Mar 8, 1901 |year=1901 |title=Recent Progress in Geodesy. |volume=13 |issue=323 |pages=381–383 |doi = 10.1126/science.13.323.381 |journal = Science |first1 = JF }} *{{Citation |pmid = 17768837 |last1=Hayford |publication-date=Mar 9, 1900 |year=1900 |title=Recent Progress in Geodesy. |volume=11 |issue=271 |periodical=Science |pages=369–374 |doi = 10.1126/science.11.271.369 |first1 = JF }} *{{Citation |pmid = 17790921 |last1=Hayford |publication-date=Sep 8, 1899 |year=1899 |title=Section A--Astronomy and Mathematics. |volume=10 |issue=245 |pages=331–333 |doi = 10.1126/science.10.245.331 |journal = Science |first1 = JF |doi-access= }} *{{Citation |pmid = 17754918 |last1=Hayford |publication-date=Dec 9, 1898 |year=1898 |title=The Limitations of the Present Solution of the Tidal Problem. |volume=8 |issue=206 |periodical=Science |pages=810–814 |doi = 10.1126/science.8.206.810 |first1 = JF |url=https://zenodo.org/record/1448303 }}

== References == {{reflist}}

==External links== *[http://www.nasonline.org/publications/biographical-memoirs/memoir-pdfs/hayford-john.pdf National Academy of Sciences Biographical Memoir]

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{{DEFAULTSORT:Hayford, John Fillmore}} Category:1868 births Category:1925 deaths Category:American geodesists Category:People from Rouses Point, New York Category:Cornell University College of Engineering alumni Category:Mathematicians from New York (state) Category:Victoria Medal recipients Category:Members of the American Philosophical Society

{{US-geologist-stub}} Category:19th-century American earth scientists