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:
“Weapons are an important factor in war, but not the decisive factor; it is people, not things, that are decisive. The contest of strength is not only a contest of military and economic power, but also a contest of human power and morale. Military and economic power is necessarily wielded by people.”
—Mao Zedong (1893–1976)
“Whatever woman may cast her lot with mine, should any ever do so, it is my intention to do all in my power to make her happy and contented; and there is nothing I can imagine, that would make me more unhappy than to fail in the effort.”
—Abraham Lincoln (1809–1865)
“No other human being, no woman, no poem or music, book or painting can replace alcohol in its power to give man the illusion of real creation.”
—Marguerite Duras (b. 1914)