Man with large magnet is pulled up the front of a barn, the magnet stuck. Man sends a current through a compass, its needle moving. The man coils a wire around a magnet. He connects it to the circuit, making an electromagnet. He picks up a bolt with it, then cuts the current, and the bolt drops. The man from the first shot drops from the top of the barn, hits the ground, and touches his face, embarrassed. The experimenter man passes a magnet through a wire coil and shows the galvanometer responding. Man spins contraption past magnets to light a bulb. Man rides a bike down a street. Interior shot of a moving car and dashboard, then engine. LS of power plant, generators, and electrical lines. LS of lit bridge at night.