The Marianna Coal Mine in Pennsylvania exploded and killed 154 men.
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Polio vaccines were given to the first group of children in the US at Arsenal Elementary School in Pittsburgh, Pennsylvania.
The Women's College of Pennsylvania, US opened – making it the 2nd female medical school in America.
Blacksmith, Patrick Lyon stole $162,821 in cash and gold from a vault at the Bank of Pennsylvania.
Pittsburgh hosted the world's largest pinball tournament.
America's second president John Adams was inaugurated in Philadelphia, Pennsylvania.
