My last post on Earth Batteries was not very visual so I am reposting it with additions.
“Have you ever thought about alternative energy? I read about earth batteries and was very impressed many years ago. The original idea in the early 1800`s was to use iron spikes a metre long, driven into the ground several metres apart and a voltage taken off from the protruding tops of these spikes. Then came the idea to make these spikes out of different materials which then increased the output voltage. I have run small transistor radios with this method for many years in my workshop with an occasional cleaning of the rods.
Another form of power was obtained from biological batteries . This required aluminium screw top pill containers of the time and a carbon rod from an old battery. The inside of the container was cleaned with fine emery cloth and the carbon rod was fixed through a hole in the lid after insulating the rod with several layers of tape. The tins were then filled with a mixture of bead,water and sugar,and the tops screwed on. The carbon rod must not touch the the aluminium case. These cans can be jioned together for a higher voltage. Connect the carbon rod of one to the aluminium case of the next,and so on. I found 3 of these was enough to run a small radio or an electronic watch. After several weeks I had to add a little sugar and water to the mix, this brought the voltage up again. This mixure can be replaced with salt water and will still produce a voltage, but for a shorter period of time. If you find this interesting put this title “Earth Batteries” into google and you will find a lot of interesting sites. Also try the “Crystal Castle”, this is an interesting site I read many years ago and have not checked it lately. If you have a problem with these ideas, email me and I will forward you the information.”
Click on pic for larger veiw.
This voltage has remianed for some days now and is produced by putting 900 mm of 50mm diameter aluminium and galvanised pipe into the ground. These pipes are 900mm apart and 600mm deep.
This is an old 12volt battery casing from a motor bike, with the insides removed. Seawater was used with copper and aluminium electrodes and produced 4.81 volts but only 5mA under load. It did however light a red LED.
After charging it through a 1N4001 diode the voltage increased. The charger was the wind generator in my other post. Below are a few ideas that may help if this postinterests you. 


Click on these to read full screen. email: whitewolf1@live.fr for any more info.