AMERICAN INDUSTRIESNo. 69. BRUSH ELECTRIC LAMPS. 2 5 BRUSH DYNAMO-ELECTRIC MACHINE, scientific american, 1881-04-02
AMERICAN INDUSTRIESNo. 69. BRUSH ELECTRIC LAMPS. 2 5 BRUSH DYNAMO-ELECTRIC MACHINE, scientific american, 1881-04-02
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