The boldest partisans of this hypothesis go so far as to accept the temporary creation of pseudo-human limbs,--arms, legs, heads,--in the formation of which the energies of other persons present probably co-operate with those of the medium. The theory is that as soon as the energizing power of the medium is withdrawn these phantom dynamic limbs at once dissolve and disappear. For all that, we do not yet go so far as to admit the existence of free and independent beings who would be able to exercise their powers only through the human organism; and still less do we admit the existence of spirits who once animated the forms of human beings.... M. Porro openly declares that, for his part, he is neither a materialist nor a Spiritualist: He says that he is not ready to accept, _a priori_, either the negations of psycho-physiology or the faith of Spiritualists. He adds that the nine persons who were present with him at the seances represented the greatest variety of opinions on the subject, from the most firmly persuaded Spiritualists to the most incorrigible sceptics. Moreover, his task was not that of writing an official report, approved by all the experimenters, but solely that of faithfully relating his own impressions. The following are the _most important_ of these, selected from his reports on the different seances: I saw, and plainly saw, the rough deal table (a table a yard long and nearly two feet wide and resting on four feet) rise up several times from the floor and, without any contact with visible objects, remain suspended in the air, several inches above the floor, during the space of two, three, and even four seconds. This experiment was renewed _in full light_ without the hands of the medium and of the five persons who formed the chain about the table touching the latter in any way. Eusapia's hands were looked after by her neighbors, who controlled also her legs and her feet in such a way that no part of her body was able to exercise the least pressure for the lifting or maintaining in the air of the rather heavy article of furniture used in the experiments. It was under such absolutely trustworthy conditions as these that I was able to see inflated _a very thick piece of black cloth_ and the red curtains which were behind the medium, and which served to close the embrasure of the window. The casement was carefully closed, there was no current of air in the room, and it is absurd to suppose that persons were hidden in the embrasure of the window. I believe, then, that I can affirm with the utmost confidence that _a force_, analogous to that which had produced the levitation of the table, was manifested in the curtains, _inflated them, shook them, and pushed them_ out in such a way that they touched now one and now another of the company.