When the radioactive element radium was discovered, it quickly found its way into many products. One of those was glow-in-the-dark watch and clock faces, which were painted by women who licked their paintbrushes to keep them pointed. This was a deadly mistake. 

Also, learn about the demonstration of a 150,000-volt electric chair, Charles Hawker and his high-voltage electric chair, the electrifying sermon of George Speake, and the largest chain of retail stores.

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