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The Progress of the Century, lithograph, 1876, by Currier and Ives.
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The Progress of the Century, lithograph, 1876, by Currier and Ives, depicting stages of progress. (Train, telegraph, printing press, steam boat, etc).

Credit: Image donated by Corbis-Bettmann

Carnegie came of age at a time when railroads, the printing press, telegraphs, and other technological innovations were transforming the nation. The telegraph, introduced in the 1840s, was invaluable to the railroad industry, which depended upon its wires for almost instantaneous, long-distance communications.

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