Two years ago a ‘radium clock’ was constructed for the Chicago Radium Institute similar to the original one described by Strutt (Phil. Mag., 1903). Three milligrams of radium sulphate, contained in a ...

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Over 100 years ago, radium was considered a "miracle element." It was used in products like makeup, elixirs, and clocks, where radium-infused paint was used to make them glow. But then, the workers ...