which ones are listed? Humphry Davy demonstrated the first incandescent light to the Royal Institute in Great Britain, using a bank of batteries and two charcoal rods. Arc lamps provided many cities with their first electric streetlights. Photo courtesy of Matty Greene, Energy Department Alexander Graham Bell is credited with being the inventor of the telephone since his patent and demonstrations for an apparatus designed for “transmitting vocal or other sounds telegraphically… causing electrical undulations” were successful. First Bell Telephone,