MESMER, FRANZ ANTON (1734- 1815)

Introduction to Animal Magnetism

Franz Anton Mesmer (1734–1815) stands as one of the most polarizing and consequential figures in the history of medicine and psychology. An Austrian physician and scientist, Mesmer catalyzed a profound intellectual movement rooted in the belief that an invisible, physical fluid permeated the universe and connected all living beings. This concept, which he formally termed animal magnetism, became colloquially known as mesmerism. His theories, while ultimately rejected by the orthodox scientific community of the late 18th century, established a crucial, albeit controversial, pathway toward understanding the power of suggestion and the mind-body connection, laying the groundwork for subsequent developments in hypnosis and modern psychotherapy. Mesmer’s career was characterized by spectacular public success, intense scientific scrutiny, and eventual professional disgrace, yet his fundamental ideas about manipulating internal energies continue to resonate in alternative healing practices today.

Mesmer’s primary contribution was the introduction of the concept of “magnetic cures” designed to alleviate a vast array of physical and mental ailments. He postulated that human health relied upon the harmonious flow of this universal magnetic fluid, which he believed was analogous to physical magnetism but biological in nature. When this fluid became blocked, imbalanced, or stagnant, illness resulted. Consequently, the goal of his treatment—mesmerism—was to restore the proper flow of the fluid through external means. This involved both direct physical manipulation and the utilization of magnetized objects. The theatrical nature of his treatments, combined with undeniable results in certain patients suffering from functional disorders, captivated the European elite, ensuring his rapid rise to fame, particularly in Paris.

The treatments developed by Mesmer were revolutionary for their time, moving beyond traditional humoral theory and standard pharmacological interventions. He developed methods for channeling the magnetic fluid, often involving direct physical contact with the patient, typically performed through systematic hand passes or strokes over the body, sometimes without direct touch, known as “passes.” Furthermore, Mesmer often incorporated physical magnets into his early therapeutic sessions, believing they could enhance or direct the flow of the fluid. This blend of physical manipulation, magnetic instruments, and the highly charged atmosphere of the healing sessions created a powerful expectation of cure, demonstrating the often-overlooked psychological component of his practice, a component that Mesmer himself vigorously denied, insisting solely on the physical reality of the magnetic fluid.

Early Life, Education, and Intellectual Context

Franz Anton Mesmer was born on May 23, 1734, in Iznang, Germany, near Lake Constance. His early education was rigorous, beginning with studies in theology at the University of Dillingen and philosophy at the Jesuit University of Ingolstadt. This early exposure to Jesuit scholasticism provided him with a strong foundation in logic and classical learning, which he later applied to his unconventional medical theories. By 1759, Mesmer shifted his focus entirely to the natural sciences and medicine, enrolling at the prestigious University of Vienna, one of the leading centers of medical thought in Europe during the Enlightenment era.

His academic career culminated in 1766 with the defense of his doctoral dissertation, titled De planetarum influxu (On the Influence of the Planets). While nominally a medical text, the dissertation explored the influence of celestial bodies—specifically the sun and moon—on the human body and disease cycles. Mesmer argued that gravity and other cosmic forces exerted influence upon an invisible fluid within the body, linking human physiology directly to astronomical mechanics. This dissertation was pivotal, as it outlined the core concept that would evolve into animal magnetism: the idea of a universal, invisible, and manipulable medium governing health. Although critics later accused him of plagiarism regarding certain sections of this work, the underlying premise of a comprehensive, universal fluid was genuinely Mesmer’s intellectual springboard.

Following his graduation, Mesmer established a successful medical practice in Vienna. He married a wealthy widow, Maria Anna von Bosch, which afforded him financial security and social standing. His home became a hub for Viennese cultural life, hosting figures like Wolfgang Amadeus Mozart, whom he supported early in the composer’s career. It was during this period that Mesmer began experimenting with actual magnets, initially applying them directly to patients to treat ailments. Inspired by the work of Jesuit priest Father Maximilian Hell, who used magnets for healing purposes, Mesmer quickly moved beyond simple mineral magnetism, concluding that the curative power did not reside in the iron magnets themselves, but rather in his own ability to channel and direct the universal fluid—the inherent animal magnetism—residing within the human body. This realization marked the true birth of mesmerism as a distinct therapeutic system.

The Development of Magnetic Fluid Theory

Mesmer’s magnetic fluid theory proposed a grand, unified cosmological and physiological system. He asserted that animal magnetism was a fluid that was subtle, elastic, and capable of being transmitted from one individual to another, or from a magnetized object to a person, over a distance. This fluid was the medium through which the external forces of nature, particularly those emanating from celestial bodies, communicated with and regulated the internal workings of the human organism. According to Mesmer, a healthy individual maintained a free and balanced circulation of this fluid. Disease, conversely, was symptomatic of an obstruction or uneven distribution of the fluid, leading to physical and psychological distress.

The therapeutic process of mesmerism was fundamentally about inducing a “crisis” in the patient to forcibly redistribute the blocked fluid. Mesmer believed that by concentrating and channeling his own abundant magnetic fluid into the patient, he could break the pathological blockages. This transmission was often achieved through physical contact, such as holding hands, pressing his fingers onto the patient’s abdomen, or making the famous slow, deliberate hand passes near the patient’s body. These passes were intended to draw the stagnant fluid out or push revitalizing fluid in. The resulting “crisis” often manifested as convulsions, spasms, or emotional outbursts, which Mesmer interpreted as the visible sign that the fluid was successfully being rebalanced and the cure was taking hold.

Crucially, Mesmer insisted that animal magnetism was a purely physical force, governed by natural laws, much like gravity or electricity. He adamantly resisted any interpretation that attributed the effects of his cures to imagination, suggestion, or the patient’s faith. This was a necessary distinction for him to maintain his status as a scientist rather than a miracle worker. His refusal to acknowledge the psychological component ultimately pitted him against the Enlightenment’s rationalist medical establishment, who, while skeptical of the fluid, were beginning to grasp the powerful role of mental expectation in healing. Mesmer viewed himself as a physician manipulating a natural force, attempting to bring the invisible laws of the cosmos to bear on individual human physiology, thereby grounding his practice in a comprehensive, if ultimately unproven, scientific framework.

Triumph and Turmoil in Parisian Society

Mesmer’s success in Vienna was considerable, but it was in Paris where his reputation truly exploded. He moved to the French capital in 1778, finding a sophisticated and intellectually curious society ripe for novel ideas and dramatic remedies. Parisian society, particularly the wealthy aristocracy, was captivated by the mysterious and spectacular aspects of mesmerism. His treatments provided not just potential physical relief but also high drama and social novelty. His practice flourished rapidly, drawing patients from the highest ranks of French nobility, including figures close to Queen Marie Antoinette. This success, however, immediately generated intense jealousy and hostility from established Parisian physicians, who viewed his methods as quackery and his popularity as a threat to their professional authority.

To accommodate the overwhelming number of clients, Mesmer devised the famous group treatment method utilizing the baquet (tub). The baquet was a large, oak tub filled with chemically treated water, iron filings, and various layers of glass and bottles, designed to hold and concentrate the magnetic fluid. Patients sat around the tub, holding iron rods protruding from the cover, which they applied to their ailing parts. They were often connected to each other by ropes or by holding hands, intending to create a collective magnetic circuit. The atmosphere was deliberately controlled—dim lighting, soft music, and the presence of Mesmer himself, often dressed in elaborate silk robes, enhancing the dramatic tension and expectation of the magnetic crisis. The sheer spectacle and collective hysteria often generated powerful psychosomatic responses, leading many attendees to experience the convulsive “crisis” that Mesmer deemed necessary for a cure.

The financial success of Mesmer in Paris was staggering. He established the Society of Harmony, a kind of franchise operation where subscribers paid significant fees to learn the secrets of animal magnetism, allowing him to bypass the traditional medical licensing bodies that opposed him. This commercialization further enraged the established medical faculty. The controversy reached such a fever pitch that the French government felt compelled to intervene. Unable to either dismiss Mesmer’s success entirely or accept his claims, the government and the Royal Society of Medicine initiated formal investigations, setting the stage for the definitive scientific judgment that would dismantle his reputation in France. Mesmer, unwilling to submit his theories to blind testing, ultimately faced a hostile environment that culminated in his professional retreat.

Methodology and Clinical Practice of Mesmerism

The methodology employed by Mesmer in his clinical practice was characterized by a combination of ritualistic procedures, physical manipulation, and the calculated use of environmental factors to maximize suggestibility, though Mesmer himself would attribute all effects strictly to the fluid. The individual treatment session was meticulous: Mesmer would face the patient, often knee-to-knee, pressing his thumbs onto the patient’s abdomen or applying pressure to specific points (which later observers recognized as proto-acupressure points). He would then perform the “passes,” moving his hands slowly and deliberately from the patient’s head down to the extremities, aiming to sweep the fluid and clear blockages. This process could last hours.

The group therapy sessions involving the baquet, however, represent the most famous and psychologically potent aspect of his methodology. The structure of the group setting maximized the potential for social contagion and shared hypnotic experience. As multiple patients sat connected to the baquet and to each other, the powerful emotional and physical responses of one individual often quickly spread throughout the room. Mesmer utilized assistants, often referred to as ‘magnetizers,’ who helped manage the patients, particularly those entering a convulsive crisis. The focus on the crisis—the trembling, the shrieks, the fainting—was central, as it was the proof, in Mesmer’s eyes, that the magnetic intervention was actively purging the illness.

While Mesmer viewed the fluid as the exclusive agent of cure, later analysis, particularly that provided by the investigating commissions, highlighted the profound role of the patient’s mental state. The elaborate setting, the expectation generated by Mesmer’s fame, the intense physical focus, and the group dynamic all acted as powerful psychological levers. These methods inadvertently tapped into the placebo effect and the suggestibility of the human mind far more effectively than any known physical force. This realization—that the effects were subjective and psychological, not objective and physical—was the crucial distinction that separated Mesmer’s practice from accepted medical science and simultaneously paved the way for future psychological therapies, even though Mesmer fought vehemently against the psychological explanation until his death.

Official Scrutiny and the 1784 Commissions

The controversy surrounding Mesmer in Paris reached a critical juncture in 1784 when King Louis XVI established two separate royal commissions to investigate the claims of animal magnetism. The first commission was appointed by the Faculty of Medicine, and the second, more famous one, was established by the Royal Academy of Sciences and the Royal Society of Medicine. These commissions were staffed by some of the most distinguished scientific minds of the Enlightenment, including the American Ambassador and scientist Benjamin Franklin, the celebrated chemist Antoine Lavoisier, and the physician Joseph-Ignace Guillotin. Their mandate was to determine, through rigorous scientific experimentation, whether the hypothesized magnetic fluid truly existed and was responsible for the observed therapeutic effects.

The commissions adopted a strict empirical approach, focusing on controlled experiments designed to isolate the alleged magnetic fluid from the influence of imagination. A key component of their methodology involved the use of blind trials. In one series of tests, subjects were magnetized by Mesmer’s followers, but the subjects were blindfolded or otherwise prevented from knowing when the magnetic passes were being performed or when they were near a magnetized object. The results were conclusive: subjects experienced symptoms—the heat, the spasms, the crises—only when they were aware that they were being magnetized. When the magnetizer performed the passes in secret, or when a supposed “magnetized” object was secretly replaced with an ordinary one, the subjects experienced no effect.

In their final report, published in 1784, the commissions delivered a devastating blow to Mesmer’s scientific claims. They concluded unanimously that there was absolutely no evidence for the existence of the physical magnetic fluid. While they acknowledged that the observed physical effects on patients were real (convulsions, temporary relief), they attributed these outcomes entirely to the power of imagination, imitation (social contagion), and the heightened expectation of the patient. The report stated that while the results could sometimes be salutary, the practice was potentially dangerous due to the moral and physical disorder produced by the hysterical crises. This official scientific rejection effectively shattered Mesmer’s credibility within the French scientific community, forcing him to dissolve his society and ultimately leave Paris.

Later Years and Decline

Following the damning reports of the French commissions, Mesmer returned to Vienna around 1785. Despite the strong scientific condemnation, his fame persisted among certain segments of the public, and he continued to attract followers and practice his treatments. However, the professional landscape had drastically changed. The Enlightenment focus on empirical science had gained significant ground, making it increasingly difficult for Mesmer to operate openly without being marginalized as a charlatan. He published his seminal work, The Doctrine of Animal Magnetism, in 1784, attempting to provide a systematic defense of his theories, but this failed to sway the medical establishment.

Mesmer spent his final decades moving between various European cities, largely withdrawing from public life and practicing in relative obscurity. He was perpetually preoccupied with defending the scientific validity of his fluid theory, which he believed had been unjustly dismissed by biased and methodologically flawed commissions. Despite his personal financial decline and the loss of his initial fortune, he maintained a small circle of devoted followers who continued to practice and teach mesmerism, often adapting his methods to emphasize the psychological aspects that Mesmer himself had ignored.

Franz Anton Mesmer died in poverty in 1815 in Meersburg, Switzerland. His final years were marked by frustration over the failure of the medical world to accept his physical fluid theory. Although he failed to achieve the scientific recognition he desperately sought, the movement he started did not die with him. Instead, it fractured into various schools of thought, some focused on the residual physical practices, and others, more progressive, focusing exclusively on the mental state induced by the magnetizer—a state that would eventually be stripped of the “magnetic” label and renamed.

Enduring Influence and Legacy

Despite the comprehensive rejection of the physical fluid theory by the 1784 commissions, Mesmer’s legacy is profound and paradoxical. While he was definitively wrong about the cosmic magnetic fluid, he was inadvertently correct about the therapeutic potential of the mind. The hypnotic state induced during mesmerism was recognized, studied, and systematized by subsequent researchers, forming a direct historical lineage to modern psychological practice. Mesmerism did not vanish; it simply evolved, shedding its flawed scientific explanation while retaining its effective methodology.

The most significant direct descendent of mesmerism is hypnosis. In the 1840s, Scottish surgeon James Braid observed the mesmeric state and concluded that it was not caused by a fluid transferred from the operator but by a physiological state of intense, focused attention induced in the patient. Braid coined the term neurypnology (later shortened to hypnosis, from the Greek word for sleep, hypnos), fundamentally reinterpreting the mesmeric trance as a psychological phenomenon related to suggestion and concentration, thereby providing a rational, non-mystical explanation for the effects Mesmer had observed. Braid’s work successfully disentangled the clinical practice from Mesmer’s discredited theory.

Furthermore, the emphasis on suggestion, trance states, and the patient-therapist relationship developed through mesmerism and early hypnotism became foundational elements in the development of psychotherapy in the late 19th and early 20th centuries. Figures like Jean-Martin Charcot and, most notably, Sigmund Freud initially utilized hypnosis, derived directly from the mesmeric tradition, in their early studies of hysteria and the unconscious mind. Thus, Mesmer’s grand, flawed theory of cosmic fluid inadvertently provided the experimental setting necessary for realizing the immense power of the human psyche in healing and illness. He forced the medical community to confront the reality of psychosomatic symptoms and the efficacy of non-pharmacological interventions, securing his place as an unwitting pioneer in the history of clinical psychology.

References

1. Braid, J. (1841). Observations on the effects produced by the protracted use of mesmerism in some cases of chronic disease. The London Medical and Physical Journal, 33(2), 365-372.

2. Gauld, A. (1992). A history of hypnotism. Cambridge, UK: Cambridge University Press.

3. Gauld, A., & Grosenick, U. (2015). Mesmerism: A tale of two centuries. New York, NY: Oxford University Press.

4. Kroger, W. S. (1977). Clinical and experimental hypnosis in medicine, dentistry, and psychology (2nd ed.). Philadelphia, PA: Lippincott.

5. Mesmer, F. A. (1784). The doctrine of animal magnetism. London, UK: J. Johnson.