"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 seances; 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.

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