Text: A pendulum swings to and fro. On the left side is the Negative side or pole. On the right side is the Positive side or pole. When swining to the right the action is positive until the swing begins to come back to the center or Neutral point. During the swing back to the center the positive polarity takes on a Negative modulation because Negative polarization is a "center seeking" force whereas the Positive is an expanding force. The same holds true but in reverse for the Negative half of the pendulum's swing.

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