11904581 - Military telephone,190011866936 - Electrotherapy,190011866272 - Electrical medical lamp,186911904694 - Electric spark,positive pole11830365 - Georg Simon Ohm,German physicist11830814 - Wilhelm Konrad Roentgen,German physicist11830813 - Ball lightning kills Richmann,175311904615 - X-ray viewing machine,189511828244 - Dalibard's lightning experiment,175211904702 - Electric lights for fishing,190011904518 - Morse telegraph key11904697 - Early electric lamps11904380 - Holland submarine,New York,1890s11904102 - Early electric tram11828246 - John Daniell,English chemist11904693 - Electric spark,negative pole11830606 - Gaston Plante,French physicist11898822 - 19th-century lightship11827163 - Andre-Marie Ampere,French physicist11904374 - Early submarine11904104 - Early electric taxi cab11904100 - Early electric train11831136 - Werner Siemens,German engineer11904698 - Early electric motor,183411828662 - Franklin's lightning experiment,175211904101 - Early electric train11904696 - Electric spark,positive pole11904695 - Electric spark,negative pole11904519 - Morse telegraph stations11904577 - Early fire brigade street alarm11904103 - Early electric tram11904700 - Electrical appliances,190011904705 - Electrostatic generators,190011904701 - Electrical heater,190011904699 - Carbon arc welding,190011904616 - X-ray security machine,190011905493 - Electrical sewing machine,190011904578 - Early fire brigade street alarm