Certain distinguished savants to whom I had communicated the results we had secured, agreed in assuring me that levitations without contact would have the character of absolute certain proof if we succeeded in verifying them by the following practical device: "Sprinkle flour upon the table," they said, "at the instant your hands have just left it; then produce one or more levitations; finally assure yourselves that the layer of flour bears not the slightest sign of any touch, and all objectors will be dumb." Why, it is precisely this experiment that we have performed successfully several times. Let me give a few details: Our first trial had succeeded very badly. We used a coarse sieve which we had to move to and fro over the entire table. This produced the double inconvenience; first, of suspending too long, and so of nullifying the action of the operators; and, secondly, of spreading a layer of flour much too thick. The buoyant spring and impulse of the wills of the operators was abated, the fluidic action was thwarted, the table-top got chilled down, so to speak; nothing moved. The mischief went so far that the table not only refused us levitations and rotations without contact, but almost all the ordinary ones. Then a brilliant idea came to one of us. We possessed one of those bellows used in blowing sulphur upon vines attacked by the grape-mildew. In place of sulphur we put flour into it, and, so prepared, began the test. The conditions were most favorable. The weather was dry and warm, the table went leaping under our fingers, and, indeed, before the order to lift hands had been given, the greater part of the band of us had spontaneously ceased to touch the table-top. Then the command rings out; the whole chain lifts up from the table, and at the same instant the bellows covers its entire surface with a light dusting of flour. Not a second had been lost; the levitation without contact had already taken place. But to leave no doubt, the thing was repeated three or four times in succession. That done, the table was scrupulously examined; _no finger had touched it, or even grazed it in the slightest degree_. The fear of grazing it involuntarily had even been so great that the hands had acted fluidically from a height much greater than in previous sittings. Each one had thought he could not raise his hands too high, and the hands removed to such a distance from the top, had not had recourse to any of the manoeuvres or passes of which we had at other times made use. Keeping its place, above the table to be lifted, the chain had preserved its form intact; it had made hardly a perceptible motion in the direction of the movement it was producing at a distance from the table.