built it, and the submarine sailed first in July 1800 on the Seine River in the same city.

In France, Fulton met Robert R. Livingston, who was appointed U.S. Ambassador to France in 1801. He also had a scientifically curious mind, and the two men decided to collaborate on building a steamboat and to try operating it on the Seine. Fulton experimented with the water resistance of various hull shapes, made