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:
“The only government that I recognize—and it matters not how few are at the head of it, or how small its army—is that power that establishes justice in the land, never that which establishes injustice.”
—Henry David Thoreau (1817–1862)
“The memory ... experiencing and re-experiencing, has such power over one’s mere personal life, that one has merely lived.”
—Rebecca West (1892–1983)
“No man deserves to be praised for his goodness, who has it not in his power to be wicked. Goodness without that power is generally nothing more than sloth, or an impotence of will.”
—François, Duc De La Rochefoucauld (1613–1680)