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Large Induction Coil According to Ruhmkorff, ...
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Large Induction Coil According to Ruhmkorff, ...
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Very Large Induction Coil by Max Kohl, c. 191...
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Large Induction Coil by Max Kohl, c. 1915...
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1 Electric Motor and 2 Measuring Instruments,...
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2 Electric Motors, c. 1920...
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Electro-Magnetic Motor with Rotating Geissler...
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Electro-Magnetic Motor with Rotating Geissler...
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Early Electromagnetic Motor, c. 1860...
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Large Jointless Induction Coil According to R...
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Van de Graaff Generator and Wimshurst's Elect...
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5 Physical Demonstration Instruments, c. 1920...
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5 Physical Demonstration Instruments, c. 1920...
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4 Physical Demonstration Instruments...
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Ducretet Mercury Interrupter, c. 1900...
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6 Physical Demonstration Instruments, c. 1920...
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5 Physical Demonstration Instruments, c. 1920...
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Electric-Powered Mercury Interrupter, c. 1920...
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Group of Scientific Instruments...
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Very Large Holtz-Type Influence Machine, c. 1...
