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(AP Images)
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The railroad ran between Port Huron and Detroit, Michigan.
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The Western Union Telegraph Company is in Boston, Massachusetts.
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The phonograph is a primitive instrument in which sound vibrations were transferred by a steel stylus to a cyliner wrapped in tin foil. (AP Images)
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(AP Images)
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The Edison Electric Illuminating Company evolved into the present-day Consolidated Edison Company. (AP Images)
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It supplied power to 400 incandescent lamps owned by 85 customers. (AP Images)
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(AP Images)
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(AP Images)
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He contributed many valuable discoveries to the war effort.
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(AP Images)
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