Power
From its inception, the subway used trolleys powered by electricity from overhead lines, made possible by the invention of the trolley pole in 1880 by Frank J. Sprague. However, the modern line has been pantograph-only since the trolley wires were modified in the 1990s.
Read more about this topic: Tremont Street Subway
Famous quotes containing the word power:
“See, I have given you authority to tread on snakes and scorpions, and over all the power of the enemy; and nothing will hurt you. Nevertheless, do not rejoice at this, that the spirits submit to you, but rejoice that your names are written in heaven.”
—Bible: New Testament, Luke 10:19,20.
“When there is sympathy, there needs but one wise man in a company and all are wise,—so, a blockhead makes a blockhead of his companion. Wonderful power to benumb possesses this brother.”
—Ralph Waldo Emerson (1803–1882)
“It is better to have the power of self-protection than to depend on any man, whether he be the Governor in his chair of State, or the hunted outlaw wandering through the night, hungry and cold and with murder in his heart.”
—Lillie Devereux Blake (1835–1913)