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        Abraham and Mary Lincoln: A House Divided - Photo Gallery: Technology

        In the 19th century, a wave of new technologies brought about sweeping changes in the nation's economy. From agricultural devices like the cotton gin and the mechanical reaper to communication improvements like steamboats and the telegraph, these innovations changed the way Americans worked, traveled, and communicated. New tools even altered the way Americans lived and died; the efficient Sharps rifle was invented just two years after the first successful use of anesthesia in a Boston surgical theater. Learn more about these inventions with this gallery from American Experience: "Abraham and Mary Lincoln - A House Divided."

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