Hippolyte Pixii (1808 - 1835) was an instrument maker from Paris, France. In 1832 he built an early form of alternating current electrical generator, based on the principle of magnetic induction discovered by Michael Faraday. Pixii's device was a spinning magnet, operated by a hand crank, where the North and South poles passed over a coil with an iron core. A current pulse was experienced each time a pole passed over the coil. He also found that the current direction changed when the North Pole passed over the coil after the South pole and this of course was alternating current. Later on acting on a suggestion by Andre Ampere other results were obtained by introducing a commutator, which produced a pulsating direct current which at this time was much more preferred than alternating current. Although Pixii at this time did not fully understand electromagnetic induction this was a substantial step on the road of what machines we have today. The Eiffel Tower has become a symbol of Paris throughout the world. ... City lights viewed in a motion blurred exposure. ... Lightning strikes during a night-time thunderstorm. ... Michael Faraday Michael Faraday, FRS (September 22, 1791 – August 25, 1867) was a British scientist (a physicist and chemist) who contributed significantly to the fields of electromagnetism and electrochemistry. ... General Name, Symbol, Number iron, Fe, 26 Chemical series transition metals Group, Period, Block 8, 4, d Appearance lustrous metallic with a grayish tinge Atomic mass 55. ... André-Marie Ampère (January 20, 1775 – June 10, 1836), was a French physicist who is generally credited as one of the main discoverers of electromagnetism. ... Direct current (DC or continuous current) is the continuous flow of electricity through a conductor such as a wire from high to low potential. ...