In the summer of 1909, a 33-year-old educator from Louisville stepped off a train in a small American town carrying little more than a notebook and a letter of introduction from the Carnegie Foundation. He was not a doctor and had never set foot in an operating room. His name was Abraham Flexner, and over the following eighteen months, he visited every medical school and nearly every affiliated clinic and sanitarium operating in the United States and Canada—155 institutions in all, inspected without warning and documented in meticulous detail. What he found, town after town, was a fixture of American life so common that no one had thought to question it: the local sanitarium.
By the turn of the century, some version of such an establishment stood in county seats from Maine to California. The sick, the exhausted, and the socially ambitious came to bathe in mineral waters, receive electrical treatments, or rest under medical supervision. Within roughly fifteen years of Flexner’s journey, most of those places had vanished. The story of how that happened is rarely told as a single, coherent narrative.
To understand how so many sanitariums could disappear so quickly, one must look back more than sixty years before Flexner boarded that train—to a time when the word “sanitarium” did not exist in the American dictionary. In 1843, a physician named Joel Shew opened the first water-cure clinic in New York City, based entirely on the theory that cold water, applied through baths, wet wraps, and regulated drinking, could cure nearly any ailment. The idea came from Vincenz Priessnitz, a Silesian farmer who had gained followers in Europe by treating patients with water and rest alone. Shew’s clinic was small and unconventional, but its timing was perfect.
American medicine in the 1840s still relied heavily on bloodletting, mercury compounds, and blistering—treatments that often left patients worse off than they had been on arrival. A gentler alternative that asked patients to drink water and walk outdoors rather than face the lancet found an audience almost overnight. The movement spread through word of mouth, traveling lecturers, and a monthly journal called the Water Cure Journal, which listed new establishments as soon as they opened. By the 1850s, water-cure institutions stretched across twenty states.
Researchers who later studied the movement counted 230 separate water-cure establishments opened nationwide between 1843 and 1900. Resort villages grew up around natural springs in Virginia, upstate New York, and the Ozark Mountains, each built on the same promise: come drink the water, sit in the bath, and leave cured. Some towns, such as Saratoga Springs and White Sulphur Springs, had existed as fashionable resorts since colonial times and simply absorbed the new hydropathic language into their advertising. Others were founded from nothing by a single physician with access to a mineral spring and faith in his own methods.
Around the 1870s, the word “sanitarium” began replacing “water cure” on signage. The change was not merely cosmetic; it reflected an attempt by these establishments to appear less like a fad and more like medicine. In 1850, a doctor named Henry Foster opened a modest water-cure clinic at a sulfur spring in a small village in Ontario County, New York, a place that would eventually take its name from the enterprise. Foster’s clinic grew steadily for two decades, treating patients with baths, rest, and a holistic approach he described as caring for the whole person rather than a single symptom.
In 1871, the institution formally changed its name to Clifton Springs Sanitarium. The choice of word was significant. It borrowed the authority of a hospital while still offering the gentle, comprehensive treatment that had drawn patients to hydropathy in the first place. Other water-cure establishments followed the same pattern over the next twenty years.
By the 1890s, “sanitarium” had become the standard name for a health institution built on rest, water, diet, and a resident physician—regardless of whether that physician held a conventional medical degree. That final detail was the loophole that would eventually bring down the entire system. A great many of the physicians who founded, staffed, or inherited these county-level sanitariums had received no training at anything resembling a modern medical school. American medical education in the second half of the nineteenth century was almost entirely unregulated.
Anyone with modest capital could open a private medical college, hire a handful of local doctors to lecture part-time, and award a degree after two years of study, with no admission requirements beyond the ability to pay tuition. Laboratory work was often optional. Dissection was sometimes omitted altogether. State oversight ranged from minimal to nonexistent.
Many of these schools taught eclectic medicine, homeopathy, or naturopathy—systems based on herbal remedies, diluted substances, or physical manipulation and diet rather than conventional drugs. Graduates of these programs staffed a large share of the sanitariums spread across the country, because traditionally trained physicians tended to cluster in cities with hospitals and teaching positions, leaving the water-cure trade, literally, to whoever wanted it. By 1904, enough physicians within the American Medical Association had grown alarmed over the situation that the organization formed the Council on Medical Education, tasked with bringing order to more than 150 medical colleges then operating nationwide. The council began inspecting schools directly in 1906, assigning each a rating of A, B, or C based on facilities, faculty, and curriculum.
Eighty-two schools received the top rating that year; the rest ranged from acceptable to what one contemporary later called a disgrace. The council’s motives were not purely scientific. Conventionally trained physicians had spent decades watching eclectic, homeopathic, and hydropathic practitioners compete for the same patients and fees, often charging less and promising gentler treatments. The push to tighten accreditation standards carried the rarely spoken benefit of sharply reducing that competition.
The council realized almost immediately that privately rating schools would accomplish little as long as state licensing boards continued accepting diplomas from any institution regardless of quality. The effort needed an outside voice, someone with no financial stake in medical education, to present the case publicly and lend the weight of independent authority. The American Medical Association approached the Carnegie Foundation for the Advancement of Teaching, which agreed to fund a nationwide survey. They hired Abraham Flexner, an educator trained at Johns Hopkins with no formal medical background at all, on the theory that an outsider’s perspective would carry more credibility than that of another physician.
Flexner took the Johns Hopkins School of Medicine as his standard, a school he considered close to ideal, and measured every other institution against it. Between 1909 and 1910, he traveled to all 155 medical colleges then operating in the United States and Canada, walking through laboratories that were in some cases nonexistent, examining libraries that sometimes held only a few outdated textbooks, and interviewing faculty members, many of whom had no advanced training in the subjects they taught. Of the 155 schools he inspected, Flexner considered only sixteen genuinely equipped for modern scientific medical education. His final report recommended reducing the number of medical schools in the country from 155 to 31.
Published in 1910 under the simple title Medical Education in the United States and Canada, the report employed language nothing like bureaucratic surveys. Describing the fourteen medical schools then operating in Chicago, it called the situation a disgrace to the state whose laws permitted it and described the group of colleges as the plague spot of the country. Homeopathic and eclectic medical colleges fared no better, dismissed one after another for teaching systems the report deemed scientifically indefensible, regardless of how many patients those systems had honestly helped over the previous half-century. The immediate public reaction was fierce, and it came specifically from the schools named.
Editors of journals representing downgraded institutions accused Flexner of applying German laboratory standards to American conditions, pointing out that the top rating alone covered more than half the medical schools in the country, and that closing them all—which some feared the report implied—would leave many rural areas of America with no physician at all. Flexner did not back down, nor did the men who had commissioned him. In February 1911, barely a year after publication, Flexner traveled to Chicago to address the twenty-first annual meeting of the National Confederation of State Medical Examining and Licensing Boards. He told the assembled board members plainly that licensing examinations were the true instrument of reform.
A state board that refused to recognize diplomas from a failing school could achieve more than any amount of public denunciation. The phrase he used that day appeared in the published proceedings of the meeting: “The power of the examination is the power of destruction. ”
The full effect took a few years to appear, but it was direct and tangible. Two rival national federations of licensing boards, which had spent years duplicating each other’s work, merged in 1912 under pressure from the American Medical Association to form the Federation of State Medical Boards.
The new federation adopted the Council on Medical Education’s literal classifications—the same A, B, and C grades that had fed Flexner’s survey directly—as the standard reference for state licensing decisions. A diploma from a C-rated school or a school that had closed entirely was no longer a guaranteed path to a medical license anywhere. State legislatures began writing minimum educational requirements into law throughout the 1910s: one year of college as a prerequisite for an A rating in 1914, then two years by 1918. By 1922, thirty-eight states required at least two years of premedical college study before a student could even enroll in medical school.
The number of operating medical colleges nationwide fell from 155 to 81, with total annual graduates dropping to about 2,500. The schools hardest hit by the new licensing barrier were, for the most part, the same schools that had spent the previous half-century supplying the country’s sanitariums with physicians. Homeopathic, eclectic, and physio-medical colleges accounted for a disproportionate share of the institutions Flexner ranked at the bottom, since their entire curriculum rested on theories his report rejected outright as unscientific. The Eclectic Medical Institute in Cincinnati, one of the oldest and most respected schools of its kind, survived the immediate purge, but dozens of small eclectic and homeopathic colleges across the Midwest and South closed within a decade of the report’s publication rather than attempt the costly laboratory renovations an A rating required.
The Rockefeller General Education Board poured millions of dollars into the schools that had survived Flexner’s inspection with strong ratings, deepening the gap between well-funded institutions building modern teaching hospitals and small private colleges that could not compete. For the sanitarium in a county seat two hundred miles from the nearest major city, the consequences arrived indirectly but unmistakably. A sanitarium was only as legitimate and legal as the physician attached to it. For decades, those physicians had come precisely from the schools now stripped of state recognition.
A young doctor graduating from a homeopathic college downgraded in 1913 might find that his county’s state board would not license him to practice at all, regardless of how many patients his predecessor had successfully treated in that same building for thirty years. Older, established physicians were sometimes grandfathered under prior rules and allowed to continue practicing with licenses granted before the new standards took effect. That meant many small-town sanitariums did not disappear overnight so much as fade over time, losing their founding physician to retirement or death without a legally qualified replacement. An enterprise built on the credential of one man and a family’s mineral spring had no mechanism for renewal once the supply line of that credential was cut at its source.
Contemporary observers who had watched the water-cure movement spread across twenty states in a single generation now watched it shrink at nearly the same speed. Resort towns that had attracted thousands of summer visitors in the 1880s found their hotels half-empty by the 1920s. The mineral springs still flowed, but the medical claims that had justified the journey no longer carried weight with a public increasingly trained to ask whether a physician’s diploma came from an A-rated school. Some towns simply renamed their attractions, dropping any pretense of treating disease and marketing the buildings themselves as resorts for rest and recreation.
Others closed outright, their buildings sold for taxes or left empty at the edge of town, the word “sanitarium” still visible in faded paint on a cornice no one had bothered to repaint. The pattern repeated from New England to the Ozarks to the mineral belt of upstate New York. County after county lost, within about fifteen years, an institution that had been considered a permanent pillar of small-town American life for two full generations. What had taken more than sixty years to build across the entire map of the country collapsed in less than a decade and a half, not through any single dramatic event, but through repeated licensing decisions in state legislatures until the supply lines feeding every sanitarium in the country had run completely dry.
Not every sanitarium met the same fate. The few that survived did so through a decision that their neighbors could not or would not make. Clifton Springs Sanitarium enjoyed one advantage almost none of its competitors shared. Its founder, Henry Foster, had built his practice around homeopathy, a system Flexner’s report treated with the same suspicion it applied to eclectic and physio-medical practice.
Yet the institution itself had never depended on Foster’s personal credential the way most small-town sanitariums depended on a single resident physician. Foster had organized Clifton Springs from the start as a formal institution with a board of directors, a staff of several physicians rather than one, and a stated mission of treating the patient as a whole rather than selling a single commercial treatment. When licensing pressure arrived in the 1910s, the sanitarium’s leadership made a conscious decision to modernize rather than close. A clinical laboratory was reorganized, and standardized forms for medical history and physical examination were adopted.
The corporate name changed again in 1914 from Clifton Springs Sanitarium to Clifton Springs Sanitarium and Clinic—a small but deliberate shift in language signaling a move toward conventional medical practice. A pathologist was hired in 1917, a radiologist the following year, and by the 1920s the institution had added a urology department and a formal surgical residency—precisely the kind of scientific infrastructure Flexner’s report had demanded and found missing nearly everywhere else. In 1925, Clifton Springs joined the American Hospital Association, a membership it has now held for a full century. The name changed once more in 1959 to simply Clifton Springs Hospital and Clinic, and the institution operates under that name today as a 262-bed hospital and nursing home affiliated with Rochester Regional Health, still standing on the same site where Henry Foster opened his water-cure clinic in 1850.
In recent years, the hospital reintroduced the sulfur baths and mineral water treatments that defined the place in its first century, now available alongside acupuncture and massage therapy in a wing built specifically to honor that history rather than hide it. The most famous sanitarium of all took a completely different path to survival, one with no direct connection to Flexner’s report but with everything to do with the man who ran it. In Battle Creek, Michigan, Dr. John Harvey Kellogg had built his sanitarium into a national institution by the 1890s, attracting wealthy guests from across the country with a regimen of vegetarian diet, exercise, and hydrotherapy.
Unlike most sanitarium proprietors, Kellogg held a genuine medical degree from Bellevue Hospital Medical College in New York, so the Battle Creek Sanitarium never faced the direct licensing collapse that closed many of its competitors. It expanded instead, adding a fourteen-story tower in 1928 capable of housing 265 guests and hosting figures such as Henry Ford, Amelia Earhart, and Eleanor Roosevelt. But a legal license could not protect the institution from the Great Depression. The wealthy patrons who had once traveled across the country for treatment and rest stopped coming.
New, inexpensive drug therapies such as insulin made some of the sanitarium’s core offerings seem obsolete almost overnight, and the debt from that new tower proved impossible to carry. The Battle Creek Sanitarium went into receivership in 1933, and Kellogg’s own authority over the institution he had built diminished with it. In May 1942, the sanitarium’s board approved the sale of the main buildings to the United States Army for $2,250,000, enough to pay off the institution’s debts. Kellogg died in December 1943, a year after the sale, at age 91, having watched the work of his life transform into something else entirely.
What the Army built within those walls became, for a few years, the largest regional army medical center anywhere in the country, renamed Percy Jones General Hospital. The former sanitarium treated soldiers wounded in World War II, specializing in neurosurgery, plastic surgery, and prosthetic limbs for men who had lost them overseas. After the victory over Japan in 1945, the hospital’s census peaked at 11,427 patients across all its sites combined—a scale of human suffering and recovery the original architects, who had designed rooms for wealthy guests seeking rest, could never have imagined. The hospital closed permanently in 1953 after treating nearly 100,000 patients in total.
A year later, the complex passed to the federal government and became the Battle Creek Federal Center, housing a rotating collection of government agencies ever since. In 2003, the tower building was formally renamed the Hart-Dole-Inouye Federal Center, honoring three U. S. senators—Philip Hart, Bob Dole, and Daniel Inouye—each of whom had received treatment for war wounds inside the same building when it still operated as a military hospital.
The building still stands in Battle Creek today. A third case sits between these two extremes, neither a thriving modern hospital nor a federal office building, and it may offer the clearest picture of what happened to ordinary sanitariums once licensing pressures and shifting trends in American medicine caught up with them. In Dansville, Livingston County, New York, a physician named James Caleb Jackson took over a struggling water-cure hotel in 1858 and turned it into one of the most famous sanitariums in the country: a six-story brick building that patients called “Our Home on the Hill Side,” where guests came for hydrotherapy, a diet of fruit and unprocessed grains, and rest from what the era called “nervous exhaustion. ” Jackson invented one of the first dry breakfast cereals there in the 1860s, a product he named “Granula.
” At its peak, the resort attracted figures such as Susan B. Anthony, Elizabeth Cady Stanton, and Horace Greeley. Jackson died in 1895, and his son and daughter-in-law continued running the sanitarium into the new century. The same forces reshaping American medicine elsewhere were closing in.
The institution declared bankruptcy in 1914, just three years after Flexner told state licensing boards in Chicago that examination held the power of destruction. The building did not vanish immediately. The Army briefly used it as a psychiatric hospital for World War I veterans. In 1929, fitness promoter Bernarr Macfadden bought the property and reopened it as the Physical Culture Hotel, seeking a new, secularized version of the same wellness promises Jackson had once sold as medical treatment.
Even that final incarnation did not last. The hotel closed for good in 1971, and the building has stood empty on a sloping hill ever since, its windows broken, its floors collapsing in places, known to the people of Dansville today simply as “The Castle on the Hill. ” In 2008, New York State allocated $2. 5 million for its restoration.
The building still stands there now, awaiting its fate. It is the closest thing remaining to a physical monument to an entire class of American institutions that spread across the country in one long, forgotten generation, then faded within just fifteen years. Most sanitariums scattered across the rest of the map left behind neither federal buildings nor century-long hospital records, but smaller, quieter remnants. A local historical society in Wisconsin holds a single ledger for a water-cure that operated for thirty years, then simply stopped.
The last entry in the ledger is dated 1915, with no explanation attached. A hotel in the Ozarks that once advertised a resident physician and mineral spring treatment for rheumatism now operates as a bed-and-breakfast; its brochures mention the spring but not the doctor. In a dozen small towns across upstate New York and the Virginia mountains, a street still bears the name “Sanitarium Street” or “Sanitarium Road,” a leftover of civic vocabulary for a building long since converted to private residence, apartment complex, or vacant lot. Local newspapers from the 1910s, read in sequence on microfilm, show a familiar rhythm repeating from county to county: an announcement of the resident physician’s retirement, followed a year or two later by notice that the sanitarium was under new management, then within a few years an advertisement for the building itself as a boarding house or a more narrowly focused private sanitarium, before the building disappeared from the paper’s pages entirely.
A church camp in Indiana, originally established around a mineral spring and a resident hydropathic physician, quietly dropped the word “sanitarium” from its letterhead around 1916 and continued as a religious retreat center. The medical claims were simply allowed to lapse without any formal announcement. None of these records suggests a coordinated cover-up. They show simply, county after county, the same economic mechanism operating at the level of an individual town rather than a national statistic.
Not every one of the approximately 3,000 U. S. counties hosted a sanitarium bearing that exact word on its sign, and no national census counted them in a single place. But the water-cure and sanitarium movement, over roughly eighty years from Joel Shew’s first hydropathic practice in 1843 through the final wave of Flexner-era licensing laws in the early 1920s, touched a substantial portion of American communities in a way modern readers tend to underestimate, because so little of it remains in memory.
The resort with a mineral spring and a resident physician was, for a rural county seat in 1880 or 1900, a genuine source of pride, listed in county histories alongside the courthouse and the railroad station as proof of the town’s advancement. The disappearance of that landmark within a single generation is exactly why so few people today know it existed in the first place. Abraham Flexner himself lived another five decades after his report reshaped American medicine, long enough to see both its intended results and its unintended costs with clarity. Medical education in the United States became more scientifically rigorous, more laboratory-dependent, and more consistent across schools, largely along the lines he had proposed using Johns Hopkins as a model.
But the same standards that closed weak proprietary schools also closed institutions that had been training physicians for communities the rest of the medical sector had not served well in the first place. Of six Black medical schools still operating in 1910, Flexner examined all of them and found only two—Howard University and Meharry Medical College—worth preserving. The other five closed within roughly thirteen years of the report’s publication. Flint Medical College in New Orleans, which had opened its doors in 1889, closed in 1911, the same year state licensing boards formally adopted Flexner’s recommendations in Chicago.
Historians studying the period have estimated the closures may have cost the country between 30,000 and 35,000 additional Black physicians who would have been trained and practiced over the following century. Women’s medical colleges fared little better, many of them founded specifically because women were barred from the schools Flexner considered acceptable, and most of those institutions closed in the same decade. The report that emptied the small-town sanitariums of America did not modernize American medicine along a clean, uncomplicated path. It modernized it according to a narrow definition of legitimacy, and that had costs paid disproportionately by communities that had relied on the kind of locally trained, accessible physicians the sanitarium system had produced.
When looking at a story like this, there is a temptation to search for a single villain, a decision made secretly in a boardroom, or a fortune protected at the expense of ordinary people. The historical record does not really support that picture. Flexner published his findings openly under his own name, with the backing of a foundation that clearly stated what it was doing and why. The state licensing boards that adopted his recommendations did so in public meetings, with minutes printed for anyone to read.
The collapse of the American sanitarium required no hidden hand; it was the result of an ordinary, documented series of institutional decisions, each one logical in its own context, that together produced something far larger than anyone involved could have predicted. The drive to raise the scientific standards of American medicine, aimed first at the diploma mills turning out physicians with two years of study and no laboratory training, expanded to encompass an entire class of small, locally rooted institutions that had spent sixty years becoming part of the everyday fabric of rural American life. The eclectic and homeopathic physicians who ran those sanitariums were, for the most part, not charlatans exploiting the desperate. Many of them genuinely helped their patients within the limits of what nineteenth-century medicine could offer, using rest, clean water, and personal care in an era when the alternative at a conventional physician’s office might involve mercury or the lancet.
The report that closed the schools training their successors was not wrong that laboratory science, germ theory, and standardized clinical training would save more lives in the long run. Both truths can be true at once, and the historical record, read carefully rather than through the comfortable myth of steady progress, generally insists that they were. What remains today is scattered and easy to miss unless one knows where to look. A hospital in the Finger Lakes region still treats patients on the same site where a sulfur spring first attracted visitors in 1850, its modern imaging equipment sharing the building with a wing dedicated to the same mineral baths that made the place famous a century and a half ago.
A federal office building in Michigan processes government paperwork within walls once intended for guests seeking the rest cure Kellogg offered, its history preserved mostly through the names of three of its halls honoring wounded senators rather than through any public memory of the sanitarium that created it. A brick castle in western New York stands empty on its hill, awaiting a restoration grant, the last physical relic of a health movement that once drew abolitionists, suffragists, and presidents through its doors. The word “sanitarium” itself barely survives in American speech now, often used as a vague synonym for an old mental asylum in vintage films, stripped of the hopeful meaning it carried for more than a century. Say it to most people today, and they will picture something closer to a horror movie set than a hotel on a hill where an exhausted factory worker or an overburdened minister might have spent two weeks of rest, drinking spring water and walking quiet paths under the care of a resident physician.
That gap between the old meaning of the word and its current one is itself a small piece of evidence, a linguistic fossil showing precisely how completely an entire institution faded from public memory once its supply lines ran dry, leaving behind a handful of surviving buildings, some street signs, and a 1910 report still largely unread in the archives of a foundation that never stopped working.