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We thus hope to objectively inform the educated public which is more and more interested in this research, which it rightly considers to be essential, to definitively relegate a series of ambiguities that have persisted to this day to the great damage of the truth and to warn experimenters and uninformed authors against the undesirables of the psyche.

It is indeed regrettable that the author in good faith, but ill-informed and more skillful in handling ideas than in carrying out experiments, continue to consider doubtful or manifestly falsified facts as authentically paranormal.