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The American Electro Magnetic Telegraph
With the Reports of Congress, and a Description of All Telegraphs Known, Employing Electricity or Galvanism
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Kitap hakkında
The invention of the telegraph in 1843 revolutionized communication for the rest of the world. Now, there was a way to send nearly instantaneous messages from a longer distance than was ever dreamed possible.
The invention of this device and the mechanisms by which it operates are categorized in this book by Alfred Vail.
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