File:Thomas Edison at the telegraph key. (610199dee46f4b538f8dc98d8c098b64).jpg
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![File:Thomas Edison at the telegraph key. (610199dee46f4b538f8dc98d8c098b64).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Thomas_Edison_at_the_telegraph_key._%28610199dee46f4b538f8dc98d8c098b64%29.jpg/711px-Thomas_Edison_at_the_telegraph_key._%28610199dee46f4b538f8dc98d8c098b64%29.jpg?20220114183845)
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