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Harold Hartley 1905 - 1975

Harold Hartley of Prospect Park, Delaware County, PA was born on July 31, 1905, and died at age 69 years old in May 1975.
Harold Hartley
Prospect Park, Delaware County, PA 19076
July 31, 1905
May 1975
Male
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Harold Hartley's History: 1905 - 1975

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  • 07/31
    1905

    Birthday

    July 31, 1905
    Birthdate
    Unknown
    Birthplace
  • 05/dd
    1975

    Death

    May 1975
    Death date
    Unknown
    Cause of death
    Unknown
    Death location
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  • Did you know?
    Harold Hartley lived 4 years shorter than the average family member when died at the age of 69.
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Did you know?
In 1905, in the year that Harold Hartley was born, the German born physicist, Albert Einstein, proposed the Special Theory of Relativity: 1) that observers can never detect uniform motion except relative to other objects and that 2) unlike the velocity of massive objects, the speed of light is a constant and is the same for all observers independent of their constant velocity toward or away from the light source. Not such simple concepts that lead to the equation everyone now knows: E = mc2.
Did you know?
In 1923, at the age of 18 years old, Harold was alive when the A.C. Nielsen Company was founded in Chicago. It provided an audience measurement system that could provide radio station owners with information on their listeners and the popularity of their shows. Later, the Nielsen company became the basis for the fate of television programs.
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Harold Hartley's Family Tree & Friends

Harold Hartley's Family Tree

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Friendships

Harold's Friends

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Other Biographies

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