Electrophorus
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“The electrophorus and meethod of using. Charge B; place A in contact with B, and touch A (left illustration). The disc is now charged by induction and will yield a spark when touched by the hand (right illustration).” -Hawkins, 1917
Source
Hawkins and Staff Hawkins Electrical Guide Number One (New York: Theo. Audel and Company, 1917) 17
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