Google Doodle Honors Alessandro Volta
A century and a half after Galileo's death, something of scientific importance was to develop in Italy. Volta found that it was the presence of two dissimilar metals, not the frog leg, that was critical. In 1800, after extensive experimentation, he developed the voltaic pile. The original voltaic pile consisted of a pile of zinc and silver discs and between alternate discs, a piece of cardboard that had been soaked in saltwater. A wire connecting the bottom zinc disc to the top silver disc could produce repeated sparks. No frogs were injured in the production of a voltaic pile. Read More.. (http://www.corrosion-doctors.org/)
Read about Alessandro Volta in Wikipedia
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