The ESP Chip Alexander Allen

The spectator freely selects any one of the five ESP symbols. There is absolutely no force. The performer displays a Poker Chip, blank on both sides and drops it into a small pay envelope. The spectator is asked to concentrate on his selected symbol, as the envelope with the blank chip is held to his forehead. When the spectator subsequently opens the envelope, an impression of his selected design is found to have transferred onto the chip, engraved on it.