Stubblefield Electrical Battery Replication

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N. B. Stubblefield has a patent for an electrical battery. Patent # 600457.
Here is my attempt at replicating his battery - coil device.
I've made one in the past with only copper wiring. Upon closer inspection of the
patent, however, I see that Stubblefield calls out exposed iron (or steal) wire for
the negative pole. You need both metal types to create the battery.
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