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    With it, a worker could eventually clean 300 to 300 69... A thousand pounds of cotton a day.
    0:32

    With it, a worker could eventually clean 300 to 300 69... A thousand pounds of cotton a day.

     1  view
    By hand, a slave could clean about a pound of cotton a day.
    0:43

    By hand, a slave could clean about a pound of cotton a day.

     5  views
    This is the story of an invention that changed the world.
    0:33

    This is the story of an invention that changed the world.

     2  views
    Whitney, 28, graduated from Yale University.
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    Whitney, 28, graduated from Yale University.

     6  views