Alphonse. Dumas and Camille Benoit. "Physique Appliquée — Note sur un appareil propre à éclairer les ouvriers mineurs dans leurs travaux souterrains au moyen de la lumière d'induction", in Comptes Rendus, 1862, vol. 55, pages 439-440. Offered in the weekly issue, with the original wrappers, removed from alarger bound volume. (Title translated: “Applied physics — Note on an apparatus suitable for providing light for miners in their underground work by means of the induction lamp”.). Very Good copy. $200
“In several of Jules Verne's science-fiction novels, so-called "Ruhmkorff lamps" are mentioned. These were an early form of portable electric lamp. The lamp consisted of a Geissler tube that was excited by a battery-powered Ruhmkorff induction coil. Initially the lamp generated white light by using a Geissler tube filled with carbon dioxide. However, the carbon dioxide tended to break down. Hence in later lamps, the Geissler tube was filled with nitrogen (which generated red light), and the glass was replaced with glass containing uranium salts (which fluoresced with a green light)."
"Intended for use by miners, the lamp was actually developed both by Alphonse Dumas, an engineer at the iron mines of Saint-Priest and of Lac, near Privas, in the départment of Ardèche, France, and by Dr. Camille Benoît, a medical doctor in Privas.[their results and announcement occurred in the paper offered here]. In 1864, the French Academy of Sciences awarded Dumas and Benoît a prize of 1,000 francs for their invention.”--Wikipedia
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