American driller Edwin Laurentine Drake successfully drilled the first oil well in Pennsylvania, US.
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The first motion picture was shown to a theater audience at the Philadelphia Academy of Music.
Milton S. Hershey founded Hershey's Chocolate Company in Lancaster, Pennsylvania, US.
The famous Liberty Bell arrived in Philadelphia, US.
Polio vaccines were given to the first group of children in the US at Arsenal Elementary School in Pittsburgh, Pennsylvania.
One hundred and forty thousand miners went on strike in Pennsylvania.
