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Mary Demaat 1900 - 1979

Mary Demaat of Grand Rapids, Kent County, Michigan was born on May 26, 1900, and died at age 79 years old in December 1979.

Mary Demaat
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Grand Rapids, Kent County, Michigan 49505
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May 26, 1900
Birth
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December 1979
Death
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Updated: November 3, 2011
Biography ID: 51750983 What's this
Mary Demaat Mary Demaat (1900 - 1979)
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Mary Demaat's History: 1900 - 1979

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  • 05/26
    1900

    Birthday

    May 26, 1900
    Birthdate
    Unknown
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  • 12/dd
    1979

    Death

    December 1979
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  • Did you know?
    Mary Demaat lived 2 years longer than the average family member when died at the age of 79.
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In 1900, in the year that Mary Demaat was born, 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.
Did you know?
In 1912, when she was just 12 years old, Arizona was admitted to the United States in February (on Valentine's Day). It became the 48th state in the Union. Previously a Spanish - then Mexican - territory, the U.S. paid $15 million dollars for the area in 1848. Arizona was the last of the contiguous states to be admitted to the United States.
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Mary Demaat's Family Tree & Friends

Mary Demaat's Family Tree

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Mary Demaat May 26, 1900 - Dec 1979
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Other Biographies

Other Demaat Family Biographies

Demaat, Albert (Apr 15, 1910 - Sep 1974) Demaat, Esther (May 22, 1923 - Jan 23, 2002) Demaat, David (Oct 7, 1932 - Feb 1972) Demaat, Leon (May 30, 1925 - Aug 16, 2006) Demaat, Ethel (Jun 11, 1921 - Jan 22, 2005) Demaat, Minnie (Nov 30, 1912 - Apr 14, 1996) Demaat, Henry (Jun 23, 1910 - Jun 16, 1998) Demaat, Henry (Mar 2, 1901 - Oct 1986) Demaat, Carrie (Feb 7, 1887 - Jun 1978) Demaat, Henry (Jan 18, 1882 - Jan 1963)
Demaat, Robert (Apr 22, 1924 - Feb 1986) Demaat, Elmer (Sep 2, 1921 - Jun 1981) Demaat, Marilyn (Sep 20, 1926 - Sep 24, 2009) Demaat, Cora (Apr 3, 1916 - Oct 1985) Demaat, Ralph (Mar 29, 1908 - Apr 21, 1995) Demaat, John (Jul 29, 1878 - Aug 1970) Demaat, Sarah (Jan 6, 1893 - Aug 1973) Demaat, Ruth (Nov 23, 1924 - Apr 15, 2002) Demaat, Jeanette (Jun 27, 1909 - May 1996) Demaat, Hanna (Aug 15, 1893 - Jun 1980)
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