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1by Bowers, BrianTable of Contents: “... Wheatstone ; Researches in electricity ; Electrical measurements -- pt. 3. The telegraph: Early telegraphy...”
Published 2001
Book -
2by Hindmarch-Watson, Katie, 1979-Table of Contents: “... the Central Telegraph Office -- Bodied telegraphy -- Unintended network -- Tapped wires -- Martial mercuries...”
Published 2020
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