20 November 2007

The Baghdad Battery

In 1936, several tall terracotta pots were uncovered in Khuyut Rabbou'a, near Baghdad. Each contained a sheet of copper rolled around a rod of iron. The jar would be filled with an acidic liquid, such as grape juice, which would generate an electrical charge.

That is, perhaps the world's first battery, used nearly 1800 years before Count Alassandro Volta measured electric potential by placing to different metal prongs against the flesh of a frog.

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