The American Electro Magnetic Telegraph: With The Reports Of Congress, And A Description Of All Telegraphs Known, Employing Electricity Or Galvanism. Illustrated By Eighty-one Wood Engravings

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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. Illustrated By Eighty-one Wood Engravings

Alfred Vail

Lea & Blanchard, 1847

Technology & Engineering; Telecommunications; Technology & Engineering / Telecommunications; Telegraph