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John Mahaffey 1889 - 1963

John Mahaffey of Iowa was born on February 9, 1889, and died at age 74 years old in September 1963.

John Mahaffey
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Iowa
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February 9, 1889
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September 1963
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Male
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Updated: November 8, 2011
Biography ID: 73174065 What's this
John Mahaffey John Mahaffey (1889 - 1963)
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John Mahaffey's History: 1889 - 1963

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  • 02/9
    1889

    Birthday

    February 9, 1889
    Birthdate
    Unknown
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  • 09/dd
    1963

    Death

    September 1963
    Death date
    Unknown
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  • Did you know?
    John Mahaffey lived 2 years longer than the average family member when died at the age of 74.
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In 1889, in the year that John Mahaffey was born, on March 4th, Benjamin Harrison became the 23rd President of the United States. His grandfather, William Henry Harrison, was the 9th President of the United States. His father, John Scott Harrison - son of William Henry - was in the U.S. House of Representatives.
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In 1900, John was merely 11 years old when the German physicist Max Planck formulated an energy theory, postulating the existence of "quanta," which lays the groundwork for the quantum theory of modern physics. In December, he introduced a paper on the Planck postulate which stated that E=hv - the energy of a photon is proportional to its frequency times a constant. Planck won a Nobel Prize in 1918 for his work in theoretical Physics.
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John Mahaffey's Family Tree & Friends

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Other Biographies

Other John Mahaffey Biographies

Mahaffey, John (Jul 10, 1908 - Dec 15, 1958) Mahaffey, John (Oct 13, 1898 - Jan 1985) Mahaffey, John (Nov 7, 1890 - Dec 17, 1991) Mahaffey, John (Jan 6, 1887 - Aug 1966) Mahaffey, John (May 20, 1894 - Feb 1982) Mahaffey, John (Feb 3, 1895 - Feb 1958) Mahaffey, John (Nov 8, 1885 - May 1980) Mahaffey, John (Mar 21, 1923 - Dec 23, 2003) Mahaffey, John (Sep 4, 1903 - May 1967) Mahaffey, John (Jun 13, 1921 - Jun 15, 1988)
Mahaffey, John (Feb 5, 1940 - Aug 1, 2008) Mahaffey, John (Oct 29, 1980 - Jul 1981) Mahaffey, John (Jul 19, 1912 - Nov 12, 1989) Mahaffey, John (Sep 14, 1938 - Sep 10, 1997) Mahaffey, John (Apr 8, 1927 - Jan 1980) Mahaffey, John (Apr 7, 1930 - Jul 8, 2011) Mahaffey, John (Nov 13, 1912 - Nov 1982) Mahaffey, John (Apr 9, 1896 - Dec 15, 1968) Mahaffey, John (Apr 24, 1916 - Sep 1986) Mahaffey, John (Jul 17, 1945 - Dec 1975)

Other Mahaffey Family Biographies

Mahaffey, Mary (Sep 15, 1898 - Feb 1989) Mahaffey, John (Jul 10, 1908 - Dec 1958) Mahaffey, Roberta (Feb 18, 1935 - Apr 25, 2007) Mahaffey, Thomas (Feb 16, 1915 - Sep 1969) Mahaffey, Sabatina (May 26, 1928 - Apr 12, 2005) Mahaffey, Clay (Sep 23, 1908 - Apr 1974) Mahaffey, Shirley (Nov 4, 1936 - Nov 19, 2003) Mahaffey, Mary (Feb 1, 1927 - May 22, 1996) Mahaffey, Rita (Jun 7, 1914 - Jul 1981) Mahaffey, Robert (Aug 11, 1938 - Nov 22, 2005)
Mahaffey, Ronald (Sep 13, 1940 - Jan 17, 1997) Mahaffey, Ruth (May 19, 1931 - Nov 4, 2005) Mahaffey, Harry (May 2, 1895 - May 1979) Mahaffey, Robert (Jun 11, 1930 - Feb 6, 2011) Mahaffey, Mose (Dec 2, 1897 - Mar 22, 1993) Mahaffey, Fred (Oct 8, 1905 - Feb 7, 1989) Mahaffey, Katherine (Nov 7, 1907 - Jan 1995) Mahaffey, Dorothy (Apr 7, 1909 - Aug 1974) Mahaffey, Charlotte (Apr 28, 1894 - Oct 1974) Mahaffey, Burton (Oct 11, 1927 - Aug 2, 1998)
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