They were told the glow was harmless.... Radium Girls were 20th Century factory workers who suffered fatal radiation poisoning from painting glow-in-the-dark watch and military dials. Workers were told the paint was harmless and taught to shape their paintbrushes with their lips (a technique called "lip-pointing"), which caused them to swallow deadly amounts of radium every day. Radium dust coated the women's skin, hair, and clothes, leading coworkers to affectionately call them "ghost girls".... In the early 1920s, young women across New Jersey and Illinois took jobs painting watch and instrument dials with a luminous paint made from radium. The factories advertised the work as safe, even healthful. Radium was a wonder substance, they were told. A sign of modernity. To apply the delicate numerals, the women were taught a technique: lick the paintbrush to a fine point, dip it in the radium solution, apply the number. Lick, dip, paint. Over and over, hundreds of times a day. They glowed. Literally. After their shifts, their hair shimmered faintly in the dark. Their clothes left glowing impressions on the furniture. Some of them wore their luminous clothes to dances, delighted by the effect. The factory owners knew this and said nothing useful about it. By the mid-1920s, the women began to get sick. Jaws deteriorated. Teeth fell out. Bones fractured without cause. The pain was unlike anything the local doctors had encountered. Several women died before anyone understood why. When the workers and their families pressed the companies for answers, the response was not compassion. It was calculation. Corporate doctors examined the women and delivered verdicts that had nothing to do with radium. The official position, in more than one case, was syphilis. Women who had never had the disease were told, in front of their families, that their bodies were destroying themselves from the inside because of their own moral failures. It was a lie, and the companies knew it. Internal documents that surfaced years later would show that executives and their hired scientists had data suggesting radium exposure was dangerous well before the public denials began. They suppressed it. The women went on painting. Some of them were already dying. A handful of the women decided to sue. This was not a simple decision. They were working-class women in a period when corporations had the law largely on their side. Several of the plaintiffs were too ill to sit up in court. One, Grace Fryer, had spent years trying to find a lawyer willing to take the case before she found one who would. The companies delayed, appealed, offered settlements far below what the women had asked, and tried to run the clock out on plaintiffs they expected would die before a verdict could be reached. In 1928, five women pursued the case in New Jersey. The story reached national newspapers. Public opinion, slowly and then quickly, shifted. The companies eventually settled. The women won compensation. More importantly, the case helped establish that employers had a legal obligation to protect workers from known occupational hazards, a principle that had not yet been firmly anchored in American law. The company doctors who diagnosed those women with syphilis knew what they were looking at. That detail tends to get lost in the broader story, and it probably shouldn't. #archaeohistories