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:
“It is probable that the principal credit of miracles, visions, enchantments, and such extraordinary occurrences comes from the power of imagination, acting principally upon the minds of the common people, which are softer.”
—Michel de Montaigne (1533–1592)
“A physician can sometimes parry the scythe of death, but has no power over the sand in the hourglass.”
—Hester Lynch Piozzi (1741–1821)
“All goes to show that the soul in man is not an organ, but animates and exercises all the organs; is not a function, like the power of memory, of calculation, of comparison, but uses these as hands and feet; is not a faculty, but a light, is not the intellect or the will, but the master of the intellect and the will; is the background of our being, in which they lie,—an immensity not possessed and that cannot be possessed.”
—Ralph Waldo Emerson (1803–1882)