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The story of the development of a device of a distinctively new order, from its first inception to its practical reality, adds a human interest to its description which is perhaps too often lacking among scientific records. In 1900 when I was beginning experiments on the electrolytic responder, it was my good fortune to have to work upon it at night in my own room, at a table beneath a solitary gas-burner with Welsbach mantel. My source of hertzian waves was the discharge of a small induction-coil placed in an opposite corner and set into operation by a key closed by pulling a string.

Notas/Comentarios de José A. Delgado-Penín:
Artículo histórico donde se presenta el "Triodo" (cátodo, ánodo y rejilla entre los dos anteriores elementos metálicos) al que llamó Audion y utilizado por primera vez en la transmisión-recepción telegráfica.

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