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:
“I only wish that ordinary people had an unlimited capacity for doing harm; then they might have an unlimited power for doing good.”
—Socrates (469–399 B.C.)
“The poet is the person in whom these powers are in balance, the man without impediment, who sees and handles that which others dream of, traverses the whole scale of experience, and is representative of man, in virtue of being the largest power to receive and to impart.”
—Ralph Waldo Emerson (1803–1882)
“...men give us most rarely that which we really want, not favor, but—Justice. Nothing is easier than to coax them to pet us like children, nothing more difficult than to persuade them to treat us like responsible human beings.”
—Frances Power Cobbe (1822–1904)