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Mary Hartley 1900 - 1981

Mary Hartley of Philadelphia, Philadelphia County, Pennsylvania was born on July 31, 1900, and died at age 80 years old in March 1981.
Mary Hartley
Philadelphia, Philadelphia County, Pennsylvania 19119
July 31, 1900
March 1981
Female
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Mary Hartley's History: 1900 - 1981

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  • 07/31
    1900

    Birthday

    July 31, 1900
    Birthdate
    Unknown
    Birthplace
  • 03/dd
    1981

    Death

    March 1981
    Death date
    Unknown
    Cause of death
    Unknown
    Death location
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  • Did you know?
    Mary Hartley lived 7 years longer than the average family member when died at the age of 80.
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Did you know?
In 1900, in the year that Mary Hartley 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 1924, when she was 24 years old, on January 21st, Vladimir Lenin, a leader of the Russian Revolution and the first leader of the Soviet Union died. He had survived two assassination attempts but had subsequent physical problems, suffering 3 strokes. He was in such great pain, it is said that he asked Stalin to poison him. The circumstances of his death are still disputed. He did oppose Stalin as the next leader - nonetheless, Stalin won a power struggle and ruled as a Soviet dictator until his death in 1953.
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Mary Hartley's Family Tree & Friends

Mary Hartley's Family Tree

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