in the early 1800s, the first time
electricity was avariable for cities
like new york
electricity presented some denger because it could not be seen as it
travelled thourgh the wires , so it was inportant to warn people about
the hazards of this amaang new invention
later the menters also had a revoluing disc that
measured the energi consumption in kilowatts hour
or kilowatts consumed in an hour
another type of lamps the
flourescent linghts, were generated
by stimulanteing a sudstance with
invisible ultraviolet light