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   <subfield code="a">Machine generated contents note: 1 Hertzian Optics and Wireless Telegraphy 1 -- 2 Inventing the Invention of Wireless Telegraphy: Marconi versus -- Lodge 25 -- 3 Grafting Power Technology onto Wireless Telegraphy: Marconi and -- Fleming on Transatlantic Signaling 53 -- 4 Tuning, Jamming, and the Maskelyne Affair 89 -- 5 Transforming an Effect into an Artifact: The Thermionic Valve 119 -- 6 The Audion and the Continuous Wave 155 -- Epilogue: The Making of the Radio Age 191 -- Appendix: Electron Theory and the &quot;Good Earth&quot; in Wireless -- Telegraphy 193.</subfield>
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