Lord Kelvin's "Thunderstorm" (High voltage Generator using Water)

Switch on subtitles for more information The Kelvin water dropper, invented by Lord Kelvin (1867), is a type of electrostatic generator. Kelvin referred to the device as his water-dropping condenser. The apparatus is sometimes called the Kelvin hydroelectric generator, the Kelvin electrostatic generator, or Lord Kelvin's thunderstorm.The device uses falling water drops to generate voltage differences by using positive feedback and the electrostatic induction occurring between interconnected, oppositely charged systems.