The Clermont steamboat by Robert Fulton made its maiden trip up the Hudson River.
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Asaph Hall discovered Mars' second moon, called Phobos.
The Bank of Italy opened in San Francisco, California, and would later become Bank of America.
Balloonist John Wise started the world's first airmail service by balloon from Lafayette to Crawfordsville, Indiana.
Solymon Merrick patented the wrench tool.
Three Americans made the first successful Atlantic Ocean crossing by hot air balloon.
