Today in History - September 20

Today in History - September 20

The United States Congress abolished the slave trade in the District of Columbia on September 20, 1850, as part of the legislative package called the Compromise of 1850. Continue reading.

On September 20, 1853, Elisha Graves Otis sold his first "hoist machines," or elevators, featuring an automatic safety brake that he had recently patented. Continue reading.

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