ARUN RATH, HOST:
Now the story of another individual who unwittingly became a scientific curiosity. The Christmas after World War I ended, the hot new gadget was a wristwatch with a glow-in-the-dark dial made possible by the magic of radium. Young women could land a job painting watch faces for the U.S. Radium Corporation. They became known as the radium girls, and many of them didn't live to see 30. NPR's Rebecca Hersher has the story of one who survived for a very long time.
REBECCA HERSHER, BYLINE: The first thing a new radium girl learned when she arrived at the watch factory was how to paint the glowing numbers super tiny.
DEBORAH BLUM: Often the watch face is not much bigger than a thumbnail, so you had to have very fine work to create these numbers.
HERSHER: Deborah Blum writes about the history of poison.
BLUM: And so what they would have these young women do is I paint this tiny one, and then I re-sharpen the point of the brush in my mouth, and then I paint the tiny two.
HERSHER: Twelve numbers per watch, 200 watches per day - with every digit, the girls swallowed a little bit of radium.
BLUM: And, of course, no one thought it was dangerous in these first couple of years.
HERSHER: In fact, it was supposed to be a magical cure-all. In the 1920s, there were radium lotions, radium bath salts, radium candies.
BLUM: They actually had radium cigarettes. That's my personal favorite.
HERSHER: In 1924, Mae Keane was hired at a factory in Waterbury, Connecticut. Her first day, she remembers, she didn't like the taste of the radium paint. It was gritty. Here she is in a home video from a couple of years ago.
(SOUNDBITE OF VIDEO)
MAE KEANE: I wouldn't put the brush in my mouth. The boss was a very nice man, and he said to me, you don't like this job, do you? And I said, no, I don't. He said, would you like a pink slip? I said, yes, I would. I often wish I had met him after to thank him because I would have been like the rest of them.
HERSHER: Because, of course, radium will kill you, especially if you swallow it.
BLUM: There was one woman who a dentist went to pull a tooth, and he pulled her entire jaw out when he did it - lower jaw. Their legs broke underneath them. Their spines collapsed - horrible deaths.
HERSHER: Dozens of women died. At a factory in New Jersey, the women sued the U.S. Radium Corporation for poisoning and won. Many of them used the money to pay for their own funerals. In all, by 1927, more than 50 women had died as a direct result of radium paint poisoning, but Mae Keane lived. Over the years, she had some health problems - bad teeth, migraines, two bouts with cancer - but there's no way to know if her time in the factory all those years ago contributed to that.
KEANE: I was left with different things, but I lived through them. You just don't know what to blame.
HERSHER: Mae Keane died this year at 107 years old, the last of the radium girls. Deborah Blum says those women completely changed workplace regulations for radiation. They ultimately protected generations of future workers.
BLUM: I think it's really important. We really don't want our factory workers to be the guinea pigs for discovery. Oops is never good occupational health policy.
HERSHER: Rebecca Hersher, NPR News.
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