Engraving depicting Heinrich Daniel Ruhmkorff's commutator for reversing a current.

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Size: 5043px × 4159px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 19th, archival, archive, century, commutator, current, daniel, electric, electricity, energy, engraving, heinrich, historic, historical, history, ruhmkorff