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:
“In Europe, charters of liberty have been granted by Power. In America ... charters of power [are] granted by liberty.”
—James Madison (1751–1836)
“It does not follow ... that the right to criticize Shakespeare involves the power of writing better plays. And in fact—do not be surprised at my modesty—I do not profess to write better plays.”
—George Bernard Shaw (1856–1950)
“Relying ... on the patronage of your good will, I advance with obedience to the work, ready to retire from it whenever you become sensible how much better choice it is in your power to make.”
—Thomas Jefferson (1743–1826)