During this operation, which was performed publically by Dr. Gautier, the same phenomenon was reproduced. For says the veracious old French chronicle: “Francoise est de rechef enleuee en l’air fort hault, la tete en bas, les pieds en hault sans que ses accoustrementz se soient renuersez, au trauers desquelz il sortoit par deuant et par derriere grande quantite d’eaue et fumee puante.” Like the many preceding trials, with experiments, which are duly attested by magistrates, physicians and the clerk, seven person in all, who witnessed the phenomena, as to material facts, we cannot suspect people whose honesty was never doubted; for it was through their influence that Francoise Fontaine was set at liberty, after all her inexplicable symptoms had disappeared and her nervous malady abated. In order to render an account of the _supernatural_ phenomena observed by early demonographers and attributed to evil spirits, let us briefly glance at the experiments made regarding _Spiritualism_ by a few brave physiologists of our own epoch, who have dared to investigate the analogy existing between these two orders of phenomena. Among the modern experimenters who have made a scientific study of this subject—let us call it _Psychic Force_, if you will—we will mention Mr. Crookes, member of the Royal Society of London, the (English Academy of Sciences), the master mind, the most illustrious in modern science; the discoverer of thallium, radiant matter, photometer of polarization, spectral microscope—a chemist and physicist of the first order, accustomed to the most minute experimental investigations. The experiments of this _savant_ have been arranged by him in three classes, as follows: CLASS I.—_Movement of weighty bodies with contact, but without mechanical effort._ This movement is one of the most simple forms of the phenomenon observed; it presents degrees that vary from trembling or vibration of the chamber and its contents up to the complete elevation in the air, when the hand is placed above, of a weighty body. We commonly object that when they touch an object put in motion, they push, draw or raise it. I have experimentally proved that this is impossible in a great number of cases; but, as a matter of evidence, I attach little importance to that class of phenomena considered in themselves, and have only mentioned them as a preliminary to other movements of the same kind, but without contact. “These movements (and I may truly add all other similar phenomena) are generally preceded by a particular breeziness of the air, amounting sometimes almost to a true wind. This air disperses leaves of paper and lowers the thermometer several degrees.