Sir Charles Wheatstone, 1802 – 1875. English scientist and inventor of the Wheatstone bridge and Playfair cipher. Also known for his early contributions to Spectroscopy and Telegraphy.

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Sir Charles Wheatstone, 1802 – 1875. English scientist and inventor of the Wheatstone bridge and Playfair cipher. Also known for his early contributions to Spectroscopy and Telegraphy. From Les Merveilles de la Science, published

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