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Updated: May 21, 2025
Du Moncel had observed that powder of carbon altered in electrical resistance under pressure, and Edison found that lamp-black was so sensitive as to change in resistance under the impact of the sonorous waves. His transmitter consisted of a button or wafer of lamp-black behind a diaphragm, and connected in the circuit.
Count du Moncel was an indefatigable worker, who, instead of abandoning himself to idleness and pleasure like many of his order, believed it his duty to be active and useful in his own day, as his ancestors had been in the past. THIS distinguished American electrician was born at Barnesville in Belmont county, Ohio, on August 2, 1835.
He is a great lover of books and gardening two antithetical hobbies which are charming in themselves, and healthily counteractive. The rich and splendid library of electrical works which he is forming, has been munificently presented to the Institution of Electrical Engineers. Theodose-Achille-Louis, Comte du Moncel, was born at Paris on March 6, 1821.
Mary of the Angels. An abbess was requested from the Monastery of St. Damian for that of Moncel, of the same institute, which was forming at Florence; he consulted thereon the cardinal protector, and by his advice he selected Agnes, the sister of Clare.
The defenders of these positions were put out of action and the French took about fifteen prisoners. In the region of Moncel another party of French raiders successfully carried out a surprise attack on German positions. On this last day of the month the British headquarters in France reported that during January they had captured 1,228 Germans, including twenty-seven officers.
Even the Count du Moncel, who was ever ready to welcome a promising invention, evidently regarded it as a fantastic notion. It is very doubtful if Reis had ever heard of it.
They were a devoted pair, and Madame du Moncel played the double part of a faithful help-meet, and inspiring genius. Heart and soul she encouraged her husband to distinguish himself by his talents and energy, and even assisted him in his labours. About 1852 he began to occupy himself almost exclusively with electrical science.
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