Norris 4-6-0 locomotive
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A brightly colored green, yellow, and red Norris locomotive

Credit: Courtesy of the Historical Society of Pennsylvania Collection, Atwater Kent Museum of Philadelphia

In the 1840s Philadelphia's Norris Locomotive Works became the first American company to build a powerful 4-6-0 locomotive, which had three driv9ng axles rather than two. Norris was the nation's largest manufacturer of engines until surpassed by Baldwin in the 1860s.

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