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DU MONCEL, Théodose. Notice sur l'appareil d'induction éléctrique de Ruhmkorff suivie d'une mémoire sur les courants induits. 

Paris, Lacroix et Baudry, 1859.

8vo (215x130 mm), x-(2)-400 pages.  binding : Full green cloth. Rubbed. Fresh copy. 

Fourth edition.
The Ruhmkorff coil works like a transformer to generate very high voltages. The powerful sparks that it could generate were used much later in the experiments of the first radio-transmitters (in particular the Ouessant TSF station).

Price : 150 €

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