Wimhurst Machine. Fig. 180, page 457, 'Dental Electricity' by Levitt E Custer, 1901.

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Licence: Attribution 4.0 International (CC BY 4.0)

Credit: Wimhurst Machine. Fig. 180, page 457, 'Dental Electricity' by Levitt E Custer, 1901. Wellcome Collection. Source: Wellcome Collection.

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