A brief introduction to Earth batteries. They were initially designed an built in the 19th century to power early telegraphic systems as normal carbon zinc batteries were not available then. Some pioneers like Nathan Stubblefield soon discovered that these batteries worked off a lot more than just electrolytic action because he could power carbon-arc lamps from them. He also realised that the placement of the batteries within the earth was critical and they would not work if in the wrong place. A bit like water divining some people had the skills to locate the "good" spots for placement of these batteries.
I once built one and followed Stubblefield's patents, but all I got was a few volts. See the main site for more info, but more experiments coming up here in the future.
