"In this case, it is a question not only of storing vibrations of magnetic nature, but of really living nature, of real cerebral vibrations through the coating of the brain, stored in a magnetic crown, in which they remain for a greater or less length of time. "To arrive at this phenomenon, instead of using an unresponsive physical instrument, I use a reacting living being--an hypnotized subject, who has thus become sensitive to living magnetic vibrations. I am presenting to the Society the magnetized crown, like several other models which I have already shown. It is adapted to the head by means of a system of straps, encircles it and leaves the frontal region free. "It also forms a bent magnet with a positive and a negative pole. This crown was put, more than a year ago, on the head of a woman suffering from melancholia with ideas of persecution, agitation, and a tendency to suicide, etc. The application of the crown lead to the patient's getting slowly better after five or six séances; and at the end of ten days I thought I could send her back to the hospital without any danger. At the end of a fortnight, the crown having been isolated, the idea came to me quite empirically of placing it on the head of the 'subject' now before you. "He is a male, hypnotizable, _hystérique_, given to frequent fits of lethargy. What was my surprise to see this subject, put into the somnambulistic state, complaining in exactly the same terms as those the cured patient had used a fortnight before. "_He_ first of all took on the sex of the patient; _he_ spoke in the feminine gender; _he_ complained of violent headache; _he_ said he was going mad, that his neighbours came into his room to do him harm. In a word, the hypnotic subject had, thanks to the magnetized crown, taken on the cerebral state of the melancholic patient. The magnetized crown had been powerful enough to draw off the morbid cerebral influx of the patient (who got well), which had persisted, like a memory, in the intimate (or innermost) texture of the magnetic strip of metal. "This is a phenomenon we have produced many times, for several years; not only with the subject now present, but with others. "This communication is, amongst physiological phenomena, on a line with M. D'Arsonval's on the persistence of certain anterior states in inorganic bodies; it will no doubt cause much astonishment and scepticism amongst those who are not accustomed to hypnologic research. "Doubts will be cast on the sincerity of the subject, on his tendency to produce wonders, to being carried away, and also on what may perhaps seem too easy an acquiescence on the part of the operator.