http://americanhistory.si.edu/lighting/19thcent/consq19.htm Lighting A Revolution: 19th Century Consequences americanhistory.si.edu Lighting A Revolution: 19th Century Consequences americanhistory.si.edu Consequences of Edison's Lamp americanhistory.si.edu americanhistory.si.edu Smithsonian Institution http://americanhistory.si.edu/lighting/19thcent/consq19.htm americanhistory.si.edu americanhistory.si.edu Smithsonian Institution Consequences of Edison's Lamp americanhistory.si.edu