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The Jones Mixer at the Edgar Thomson Works. Molten steel from the blast furnace is being poured into the top of the mixer (left).

Photograph of the Edgar Thomson Steel Works, 1875

A table showing the output in tonnage of Carnegie's Edgar Thomson steel works

An image that captures a very large traffic jam in Chicago, Illinois

Young messenger boy on a bike

A photograph of Andrew Carnegie

Photo shows New York State Senator and Tammany Hall politician George Washington Plunkitt (1842-1924)

Portrait of "Boss" Tweed

Trade Magazine

This illustration shows a female labeled "Votes for Women", spreading the vote from the west to the rest of the country. It gives a visual…

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