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The Induction Coil

This antecedent of the modern transformer served for nearly a century as the principal source of high-voltage electric current. It figured prominently in three epochal discoveries

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Scientific American Magazine Vol 224 Issue 5This article was originally published with the title “The Induction Coil” in Scientific American Magazine Vol. 224 No. 5 (), p. 80
doi:10.1038/scientificamerican0571-80