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Isidor Engelhardt 1900 - 1973

Isidor Engelhardt of New York, New York County, NY was born on March 12, 1900, and died at age 73 years old in March 1973.

Isidor Engelhardt
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New York, New York County, NY 10028
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March 12, 1900
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March 1973
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Updated: October 6, 2011
Biography ID: 18905568 What's this
Isidor Engelhardt Isidor Engelhardt (1900 - 1973)
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Isidor Engelhardt's History: 1900 - 1973

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  • 03/12
    1900

    Birthday

    March 12, 1900
    Birthdate
    Unknown
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  • 03/dd
    1973

    Death

    March 1973
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  • Did you know?
    Isidor Engelhardt lived 4 years shorter than the average family member when died at the age of 72.
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In 1900, in the year that Isidor Engelhardt 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.
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In 1918, he was 18 years old when on November 1, an elevated train on the Brooklyn line of the subway - driven by an inexperienced operator because of a strike - tried to navigate a turn at 30mph. The limit on the curve was 6 mph. The 2nd and 3rd cars of the 5 car wooden train were badly damaged and at least 93 people were killed, making it the deadliest crash in New York subway history.
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Isidor Engelhardt's Family Tree & Friends

Isidor Engelhardt's Family Tree

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Isidor Engelhardt Mar 12, 1900 - Mar 1973
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Other Biographies

Other Engelhardt Family Biographies

Engelhardt, Mark (Jul 27, 1969 - Mar 7, 2010) Engelhardt, Franklin (May 25, 1896 - Jun 1987) Engelhardt, Alson (Aug 5, 1919 - Nov 6, 2003) Engelhardt, Marion (Sep 26, 1898 - Aug 1982) Engelhardt, Ronald (Mar 9, 1936 - Jan 10, 2003) Engelhardt, Frederick (Mar 31, 1915 - Apr 18, 1998) Engelhardt, Nora (Oct 16, 1917 - Feb 2, 2005) Engelhardt, Margaret (Jul 18, 1913 - Apr 22, 1999) Engelhardt, Mildred (Oct 18, 1936 - Dec 31, 2007) Engelhardt, Charles (Feb 11, 1907 - Dec 30, 1996)
Engelhardt, Grace (Mar 10, 1906 - Jul 1994) Engelhardt, Raymond (Apr 16, 1907 - Dec 1974) Engelhardt, Ellen (Nov 10, 1920 - May 5, 2008) Engelhardt, Paul (Nov 20, 1909 - May 1976) Engelhardt, Ellen (Feb 6, 1953 - Jun 1, 2011) Engelhardt, Deborah (Nov 14, 1951 - Dec 22, 1998) Engelhardt, John (Sep 26, 1912 - Dec 1, 1988) Engelhardt, Marion (Oct 7, 1910 - Feb 11, 2006) Engelhardt, Emma (Aug 22, 1878 - Aug 1971) Engelhardt, Henry (Dec 19, 1914 - Dec 20, 1970)
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