As a contribution to the facts mentioned in this class, I may report the famous experiments with the bracelet made by Dr. Puel—experiments that I have witnessed a dozen times at least—as well as numerous other persons. A bracelet made of brass, without opening or solder, cut by a machine out of a solid piece of metal, was placed on the forearm of Madame L. B. The lady’s hands rested flat on the table, or were held in the hands of those experimenting. At a given moment, often in the middle of a conversation, Madame L. B. uttered a piercing cry and at the same instant the bracelet would fall on the floor, or on some piece of furniture, with great force. Several times, under the same circumstances,—that is to say, when the lady’s hands were firmly pressed down on the table by those experimenting,—I have seen the bracelet _pass from one arm to the other_. So, in opposition to all laws of physics, it appears that matter can pass through matter; I affirm the reality of this, and others, who are no more victims to hallucination than I, can also testify to the truth of this statement. And no matter what may be the consequences to my professional reputation, and utterly without regard for anything that may be said by critics, I boldly maintain, as if under oath, that my senses lead me to this imposed conviction. Besides, I am far from being alone in believing what I have seen, whether or no it be “_in harmony with our acquired knowledge_;” to the names of French, English and German _savants_ I have cited, there are experimenters in all countries who have the courage to believe the evidence offered by their own senses, as witness that celebrated English geologist, who, after ten years of investigation with the phenomena under control, _declared spiritualism to be true_, drawing from his experiments the following conclusions: “_Who shall determine the limits of the possible, limits that science and observation accumulate each day? Let us examine, let us doubt, but not be so daring as to deny the possibility of such occurrences_” (Barkas). If now we have established the balance-sheet of facts attributed to the Demonomania of the Middle Ages, and compared them to the experiences of experimental psychology, we are not only led to recognize a striking analogy between them, but also to interpret them by the hypothesis of an intelligent force of an intensity proportionate to certain nervous pathological conditions. It is necessary to remember, in fact, that, according to the Ritual of the Roman Catholic Church, the phenomena necessary to recognize _possession_ among Demonomaniacs were: 1. The faculty of knowing thoughts, even though they are not expressed. 2. Intelligence in unknown languages. 3. The faculty of speaking foreign tongues which are unknown to the party speaking them. 4. A knowledge of future events. 5. A knowledge of what is transpiring in far-off places. 6. Development of superior psychal force.