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      Knowledge is Power

      Scientific American April 15, 1899

      The Construction of a Voltmeter and Ammeter Suitable for a Small Switchboard

      • By Nevil Monroe Hopkins on April 15, 1899

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      More in the April 15, 1899 issue of Scientific American
      • Coal for a Big Hotel—How it is Handled
      • Selected Formulæ
      • Visit of Queen Victoria to France
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