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Colonel John Stevens, of Hoboken, USA (1749-1838)
He undertook extensive development of steam engines, boilers, and propellers, as well as the forms of vessels' hulls.
1788 Built a small marine steam engine with a water tube boiler.
1825 Built a locomotive named the 'Steam Waggon', having a vertical water tube boiler. The boiler tube nest and safety valve have survived.
1807 He and his son Robert L. Stevens built the paddle-wheel steamer Phoenix, which ran on the Hudson River a few days after Fulton's steamer, the Clermont. As Fulton had secured a monopoly for steamboat navigation in the State of New York, on account of his priority, the Phoenix was run between the cities of New York and New Brunswick. She was afterwards taken out to sea and down the Atlantic Coast, then up the Delaware River to Philadelphia.
A comprehensive biography is available online