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    ive. The poles were two hundred feet apart and could barely hold up a w
    0:24

    ive. The poles were two hundred feet apart and could barely hold up a w

     9.46K  views
    h-line. The slim, bare, copper82 wire snapped on the least prov
    0:12

    h-line. The slim, bare, copper82 wire snapped on the least prov

     9.45K  views
    nd the circuit was "down" for thirty-six days in the first six mon
    0:06

    nd the circuit was "down" for thirty-six days in the first six mon

     9.45K  views
    ttle glass-knob insulators made seductive targets for ignorant sportsme
    0:07

    ttle glass-knob insulators made seductive targets for ignorant sportsme

     9.46K  views
    mpts to insulate the line wire were limited to coating it with tar62 or sm
    0:09

    mpts to insulate the line wire were limited to coating it with tar62 or sm

     9.44K  views
    h wax for the benefit of all the bees in the neighborhood. The farthest west
    0:12

    h wax for the benefit of all the bees in the neighborhood. The farthest west

     9.45K  views
    ch of the telegraph lines in 1847 was Pittsburg, with three-ply iron wire mou
    0:06

    ch of the telegraph lines in 1847 was Pittsburg, with three-ply iron wire mou

     9.46K  views
    are glass insulators with a little wooden pentroof for prot
    0:07

    are glass insulators with a little wooden pentroof for prot

     9.45K  views
    ion. In that office, where Andrew Carnegie was a messeng
    0:06

    ion. In that office, where Andrew Carnegie was a messeng

     9.44K  views
    oy, the magnets in use to receive the sig
    0:10

    oy, the magnets in use to receive the sig

     9.44K  views