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In page Charles Proteus Steinmetz:
Steinmetz also greatly advanced the understanding of lightning. His systematic experiments resulted in the first laboratory created "man-made lightning", earning him the nickname the "Forger of Thunderbolts". These were conducted in a football field-sized laboratory at General Electric, using 120,000 volt generators. He also erected a lightning tower to attract natural lightning in order to study its patterns and effects, which resulted in several theories.