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The phonautograph was invented by Édouard-Léon Scott de Martinville. It was the fist machine that could record sound waves as they passed through the air. The sounds were captured on a sheet of soot-coated paper.
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The KDKA radio station went on air In Pittsburg.
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A list shows items. A timeline shows sequence.
Use Timetoast to make dates, milestones, and turning points easier to understand in a clear visual format. Timetoast is a timeline maker for work, school, research, and stories.