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Built for the Baltimore & Ohio Railroad by Peter Cooper of New York, the Tom Thumb, a vertical boiler 1.4 horsepower locomotive, carried 36 passengers at 18 m.p.h. in August 1830.

1829 -  The Tom Thumb
Tom Thumb - Courtesy of the World's Fair
Historical Society - photo wf-268r
1829 -  The Tom Thumb
Tom Thumb - photo 161
by Arie van Dort