Electric Whirl - standard.
When brought near the dome of a generator, the whirl spins rapidly in a direction that is away from the points. The electrons escaping from the dome to the spokes ionize the air at the sharp points. Since the spokes are contiuously charged, the ionized air particles are repelled and the spinning results from an equal and opposite force reaction. Even if it given an initial spin in the opposite direction, it will stop and reverse.
Wabash Model #N-124.
Forensics Lab Supply Number 3178124.
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All products shipped from Wabash, Indiana.