Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 599
ve the etherealimpulses is extremely simple—merely a little finemetallic dust (nickel andsilver) in a glass tube included in the resonator circuit by a wire at eachend, touching the dust. This gathers together, or coheres (hence theapparatus is called the coherer), under the magneto-electric… … Fig, 281.—Portrait of Profei^or Morse. THE ELECTRIC TELEGRAPH. 11/r ORE than two centuries ago a learned Italian Jesuit, named Strada,■■-*- gave a fanciful account of a method by which he supposed twopersons might communicate with each other, however far they might beseparated. He conceived two…
Inventions
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