Stored-up electricity: Faure's secondary
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Article
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1881
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Elsevier Science
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English
β 279 KB
veyed to the ear through a rubber hearing tube (C). The wire passes through tile perforated handle (D), and is exposed only at tile extremity-. When tile wire (A) was rested against the centre of > a diaphragm upon which was tbeussed an intermittent beam of sunlight a clear musical tone was perceive