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Large Jointless Induction Coil According to R...
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Early Electromagnetic Motor, c. 1860...
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Electro-Magnetic Motor with Rotating Geissler...
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Electro-Magnetic Motor with Rotating Geissler...
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2 Electric Motors, c. 1920...
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1 Electric Motor and 2 Measuring Instruments,...
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Large Induction Coil by Max Kohl, c. 1915...
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Very Large Induction Coil by Max Kohl, c. 191...
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Large Induction Coil According to Ruhmkorff, ...
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Large Induction Coil According to Ruhmkorff, ...
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Large "Nivoc" Laboratory Induction Coil, c. 1...
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Large 16-Inch Induction Coil According to Ruh...
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Electric Motor by Cloris-Baudet, c. 1880...
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3 Induction Coils and 5 Leyden Jars...
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Group of Physical Demonstration Models...
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Large High-Voltage Apparatus According to Tes...
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Radiaver by Saint-Gobain, 1937 onwards...
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Rotax Mercury-Jet Interrupter, c. 1920...
