...Hudson that was driven by a Watt engine, moved by vapor from a tubular boiler of his own invention, and a screw propeller. The same year Oliver Evans put a steam dredgingmachine on the Delaware and Schuylkill rivers propelled by a steam paddle-wheel moved by a high-pressure engine, the first of its kind ever used. Meanwhile Robert Fulton, a professional painter, had conceived a plan for steamboat navigat...