Scientific Explanation
Blindfolded experiments showed effects only appeared when subjects believed they were receiving "magnetic treatment." No magnetic fluid existed—it was the power of suggestion (placebo effect).

The self-proclaimed charisma who heals all with invisible magnetism
A charismatic 30-something hypnotist. Claimed to cure all diseases with invisible magnetic fluid, captivating Parisian high society. Debunked by Franklin's blind experiments proving the effects were mere "suggestion." The embodiment of the placebo effect.
Proposed by Franz Anton Mesmer. Denied by blind experiments conducted by a committee including Benjamin Franklin.
Blindfolded experiments showed effects only appeared when subjects believed they were receiving "magnetic treatment." No magnetic fluid existed—it was the power of suggestion (placebo effect).
"Having an effect" and "being scientifically correct" are not the same. One of the first cases teaching humanity the importance of proper controlled experiments.
Catchphrase“If you believe, it works. ...What's wrong with that?”
Tried to use iron's magnetism as proof of "animal magnetism." Iron was not amused.
“私の磁気が流れれば、あらゆる病が癒える…(催眠ボイス)”
“見えないから存在しない? では愛や勇気も存在しないのか?”
“効果があったのは事実だ。原因が違っただけで。”
“プラシーボ?…それでも人が救われるなら、何が悪い”
“フランクリンめ…盲検法などという無粋な方法で…”
Now... relax... focus on my voice... believe in your diagnosis...
...Oops, this isn't hypnosis. It's "animal magnetism." Totally different, okay?
Mesmer: "Iron! You're attracted to magnets, right? That proves animal magnetism!"
Iron: "...That's a property of ferromagnetic materials, resulting from 3d electron spin alignment. Nothing to do with animals."
Mesmer: "But human bodies contain iron! In hemoglobin! So..."
Iron: "Iron ions in hemoglobin are diamagnetic. They don't support your claim."
Mesmer: "...Scientists have no sense of wonder."
The magnetism was an illusion. But "feeling better by believing" is still recognized by science as the placebo effect.
The greatest lesson I taught was "the necessity of controlled experiments." ...How ironic.