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:
“Our drives are reducible to the will to power. The will to power is the ultimate fact at which we arrive.”
—Friedrich Nietzsche (1844–1900)
“Money is power, and in that government which pays all the public officers of the states will all political power be substantially concentrated.”
—Andrew Jackson (1767–1845)
“The chief function of the city is to convert power into form, energy into culture, dead matter into the living symbols of art, biological reproduction into social creativity.”
—Lewis Mumford (1895–1990)