Mary Walton: The Woman Who Quieted New York’s Trains After Thomas Edison Couldn’t
When New York’s elevated trains became an unbearable neighborhood nuisance, boardinghouse owner Mary Walton fought back with sand, ingenuity, and a patent. She also developed an early approach to controlling industrial smoke. Thomas Edison had fame and laboratories. Walton had a basement, a mechanical mind, and very little patience for noisy trains.
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