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

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

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

ttle glass-knob insulators made seductive targets for ignorant sportsme

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

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

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

are glass insulators with a little wooden pentroof for prot

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

oy, the magnets in use to receive the sig