Telegram sent by G. Marconi in Wimereux to Édouard Branly in Paris, acknowledging Branly's work in developing the electric telegraph across the Channel. Photograph, ca. 1899.

Édouard Eugène Désiré Branly. Photograph by Dornac.

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Édouard Branly

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Édouard Eugène Désiré Branly. Photograph by Dornac.

Telegram sent by G. Marconi in Wimereux to Édouard Branly in Paris, acknowledging Branly's work in developing the electric telegraph across the Channel. Photograph, ca. 1899.