
磁気師 メスメル
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.
Key Figures
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).
Lesson
"Having an effect" and "being scientifically correct" are not the same. One of the first cases teaching humanity the importance of proper controlled experiments.
Primary or original-side sources
An accessible English translation of Mesmer’s original text.
Debunking papers and reviews
The Franklin commission’s famous report, using blinded comparison to show suggestion effects rather than a magnetic fluid.
Catchphrase
If you believe, it works. ...What's wrong with that?
Rivalries
Tried to use iron's magnetism as proof of "animal magnetism." Iron was not amused.
Entrance
Now... relax... focus on my voice... believe in your diagnosis...
...Oops, this isn't hypnosis. It's "animal magnetism." Totally different, okay?
Interactions
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."
Exit
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.