In 1917, the United States Radium Corporation hired young women in Orange, New Jersey, the workers that history would call the Radium Girls, to paint watch dials with a luminous substance called radium. The work was considered glamorous. The paint glowed in the dark. Supervisors instructed workers to point their brushes to a fine tip using their lips. They were told the paint was safe.
It was not safe. Radium is a radioactive element that the human body mistakes for calcium. Once ingested, it deposits in bone tissue and irradiates from within. Over years, it dissolves jaw bones. It causes bone cancers. It kills.
The Radium Girls, the name came later, from journalists, knew something was wrong before the company admitted it. Their legal fight against that company produced some of the most consequential workers’ rights precedents in American legal history. Their story is worth knowing not because it is tragic, though it is, but because it is still unfinished.
What Made Radium Seem Safe
Marie Curie had discovered radium in 1898 and won two Nobel Prizes studying it. By the 1910s, radium had become a commercial commodity associated with scientific modernity and health. “Radium water” was marketed as a tonic. Radium face creams were sold in department stores. The prevailing assumption, without adequate evidence, was that low-dose radium exposure was either harmless or beneficial.
The dial-painting industry employed this assumption directly. The luminous paint, trademarked as Undark, was used to paint watch and instrument dials for military equipment during World War One, then continued into the civilian market. The work was precise, detailed, and required a fine brush tip. The lip-pointing technique, dip, point, paint, was standard practice across multiple facilities and was taught by supervisors.
Workers recall being told the paint was harmless. Some recall being told it would put roses in their cheeks. No protective equipment was provided. The workshops were not controlled for contamination. Radium dust settled on clothing, skin, and in lungs. Some workers painted their nails and teeth with the luminous material as a joke. In the dark, they glowed.
What Happened to the Radium Girls
The illnesses appeared slowly, then catastrophically. Teeth began to loosen. Jaw bones began to fracture without apparent cause. Women who visited dentists found that extraction sites would not heal, instead, the jaw itself would begin to die, a condition now understood as radiation osteonecrosis. Some lost entire sections of their jaws. Several developed bone cancers. Others developed anaemia caused by radium’s destruction of bone marrow. The deaths began in the early 1920s.
The US Radium Corporation’s response was to deny, deflect, and commission its own medical studies, studies that produced conclusions favourable to the company. One corporate-aligned physician initially attributed the workers’ deaths to syphilis, an explanation that served to shift blame to the victims while avoiding inquiry into the factory conditions. The company knew more than it admitted. Internal documents reviewed in later litigation showed awareness of radium’s hazards that predated the workers’ complaints.
The Legal Fight That Changed Worker Safety Law
Five workers, Grace Fryer, Edna Hussman, Katherine Schaub, Quinta McDonald, and Albina Larice, filed a civil lawsuit against the US Radium Corporation in 1927. They became known in press coverage as the Radium Girls. By the time the case went to trial, most were visibly ill. Some could not raise their hands to take the oath.
The company initially claimed the statute of limitations had expired, the women had waited too long to sue. This was the central legal battle. The argument had force: the standard limitation period for personal injury claims ran from the date of injury, and the women had been painting dials years earlier. The Radium Girls and their attorneys argued that the injury was ongoing and that they had not known the cause until recently. This argument, that a limitation period should not run until a plaintiff could reasonably have discovered the injury and its cause, was not established American law in 1927.
The case settled before a court ruled on it. The five plaintiffs received financial settlements and had their medical costs paid. What they did not receive was a legal precedent, the settlement meant no court ruling.
The precedent came from a separate case in Illinois. In 1938, a group of Radium Girls who had worked at a different facility, Radium Dial Company in Ottawa, Illinois, won their case in court. The Illinois Industrial Commission found in their favour. The ruling established that workers harmed by industrial conditions could sue even when the harm had become apparent only years after exposure, the “discovery ruleA legal doctrine holding that the statute of limitations on a lawsuit begins running only when the injured party discovers — or reasonably should have discovered — that harm occurred and who caused it.” that is now standard in American tort law. Without the Radium Girls, the legal framework for most delayed-harm industrial liability cases in the United States does not exist in its current form.
The Regulatory Legacy
The Radium Girls cases contributed directly to the political environment that produced America’s first systematic worker safety legislation. The Federal Employees’ Compensation Act had existed since 1916, but it covered only federal employees. The occupational disease provisions of the New Deal-era labour reforms were shaped in part by the national press coverage of the Radium Girls’ cases, which made industrial disease a mainstream political issue for the first time.
The Occupational Safety and Health Administration, OSHA, was not created until 1970, nearly five decades after the Radium Girls first began dying. The gap between documented harm and systemic regulatory response is a recurring feature of industrial safety history. Lead paint, asbestos, and coal dust followed similar trajectories: harm documented, industry denial sustained, legal battles fought, regulatory change eventually produced but always later than the evidence warranted.
The Radium Girls also contributed to the development of radiation safety standards. The research produced by studying their cases, particularly work by physicist Robley Evans at MIT, who tracked the women’s radium burdens over decades, established the first quantitative understanding of safe radiation exposure limits. Evans’ data directly informed the radiation safety protocols that governed nuclear weapon development during World War Two and the civilian nuclear industry afterward. The women whose cases were dismissed as industrial accidents became, inadvertently, the foundation of modern radiological safety science.
What the Radium Girls Story Tells Us Now
The specific hazard, radium paint, is long gone. The structural pattern is not.
The Radium Girls’ story follows a template that recurs in industrial harm cases: a new substance or process is deployed commercially before its health effects are adequately understood; initial harm appears; corporate responses emphasize uncertainty and challenge causation; workers or their families bear the cost of proving what the employer already suspected; legal and regulatory change eventually arrives, but slowly.
Contemporary parallels are not hard to find, PFAS chemicals (so-called “forever chemicals”) in drinking water, microplasticsPlastic fragments smaller than five millimeters that result from the breakdown of larger plastic objects or are manufactured small for commercial use. They accumulate in the environment and have been detected in human tissue. in human tissue, the ongoing litigation over glyphosate, and in each case the same dynamic plays out with the same sequence. The Radium Girls’ contribution was not merely to establish legal precedents, though they did. It was to make this pattern legible for the first time, in terms public and legal systems could act on.
Five women in 1927 who could barely lift their hands to take an oath sat in a courtroom and insisted that their employer had known what it was doing to them. Decades later, the legal tools they helped create are still being used to make the same argument about different substances. That is what lasting precedent looks like.
Sources
- Wikipedia: Radium Girls , comprehensive overview of the cases, key figures, legal proceedings, and regulatory legacy, with primary source citations.
- Wikipedia: Undark (luminous paint) , history of the radium-based paint product used in the dial-painting industry.
- Moore, Kate. The Radium Girls: The Dark Story of America’s Shining Women (2017, Sourcebooks) , the definitive modern account, based on court records, personal letters, and interviews with descendants.
- OSHA: About OSHA , official history and mandate of the Occupational Safety and Health Administration, founded 1970.
