The animal magnetic fluid is not luminous and visible, like electricity; it does not produce marked and manifest effects on inert matter, as the fluid of the ordinary magnet does; finally, it has no taste.  Some magnetizers asserted that it had a smell; but repeated experiments proved that they were in error.  The existence, then, of the pretended fluid, could be established only by its effects on animated beings.

Curative effects would have thrown the commission into an inextricable daedalus, because nature alone, without any treatment, cures many maladies.  In this system of observations, they could not have hoped to learn the exact part performed by magnetism, until after a great number of cures, and after trials oftentimes repeated.

The commissioners, therefore, had to limit themselves to instantaneous effects of the fluid on the animal organism.

They then submitted themselves to the experiments, but using an important precaution.  “There is no individual,” says Bailly, “in the best state of health, who, if he closely attended to himself, would not feel within him an infinity of movements and variations, either of exceedingly slight pain, or of heat, in the various parts of his body....  These variations, which are continually taking place, are independent of magnetism....  The first care required of the commissioners was, not to be too attentive to what was passing within them.  If magnetism is a real and powerful cause, we have no need to think about it to make it act and manifest itself; it must, so to say, force the attention, and make itself perceived by even a purposely distracted mind.”

The commissioners, magnetized by Deslon, felt no effect.  After the healthy people, some ailing ones followed, taken of all ages, and from various classes of society.  Among these sick people, who amounted to fourteen, five felt some effects.  On the remaining nine, magnetism had no effect whatever.

Notwithstanding the pompous announcements, magnetism already could no longer be considered as a certain indicator of diseases.

Here the reporter made a capital remark:  magnetism appeared to have no effect on incredulous persons who had submitted to the trials, nor on children.  Was it not allowable to think, that the effects obtained in the others proceeded from a previous persuasion as to the efficacy of the means, and that they might be attributed to the influence of imagination?  Thence arose another system of experiments.  It was desirable to confirm or to destroy this suspicion; “it became therefore requisite to ascertain to what degree imagination influences our sensations, and to establish whether it could have been in part or entirely the cause of the effects attributed to magnetism.”

There could be nothing neater or more demonstrative than this portion of the work of the commissioners.  They go first to Dr. Jumelin, who, let it be observed, obtains the same effects, the same crises as Deslon and Mesmer, by magnetizing according to an entirely different method, and not restricting himself to any distinction of poles; they select persons who seem to feel the magnetic action most forcibly, and put their imagination at fault by now and then bandaging their eyes.