Fig. 9. — Experiment showing play of electric sparks between condenser plates, produced by electric charge. The coil, standing in the center of a large room, is unconnected with the energizing circuit. (From flash-light photograph.)
Fig. 9. — Experiment showing play of electric sparks between condenser plates, produced by electric charge. The coil, standing in the center of a large room, is unconnected with the energizing circuit. (From flash-light photograph.)
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