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:
“He who knows that power is inborn, that he is weak because he has looked for good out of him and elsewhere, and, so perceiving, throws himself unhesitatingly on his thought, instantly rights himself, stands in the erect position, commands his limbs, works miracles; just as a man who stands on his feet is stronger than a man who stands on his head.”
—Ralph Waldo Emerson (1803–1882)
“The reward of one duty is the power to fulfil another.”
—George Eliot [Mary Ann (or Marian)
“If your friend has displeased you, you shall not sit down to consider it, for he has already lost all memory of the passage, and has doubled his power to serve you, and, ere you can rise up again, will burden you with blessings.”
—Ralph Waldo Emerson (1803–1882)