The first [[oil]] well in the United States was drilled in the village of '''Titusville''', in northwestern [[Pennsylvania]], in 1859.<ref>San Joaquin Geological Society, ''The History of the Oil Industry (with emphasis on California and Kern County)'' [http://www.sjgs.com/history.html]</ref> It began yielding 25 barrels a day; by the end of 1859 the flow had slowed to 10 barrels a day. | The first [[oil]] well in the United States was drilled in the village of '''Titusville''', in northwestern [[Pennsylvania]], in 1859.<ref>San Joaquin Geological Society, ''The History of the Oil Industry (with emphasis on California and Kern County)'' [http://www.sjgs.com/history.html]</ref> It began yielding 25 barrels a day; by the end of 1859 the flow had slowed to 10 barrels a day. |