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:
“What I think the political correctness debate is really about is the power to be able to define. The definers want the power to name. And the defined are now taking that power away from them.”
—Toni Morrison (b. 1931)
“We have no higher life that is really apart from other people. It is by imagining them that our personality is built up; to be without the power of imagining them is to be a low-grade idiot.”
—Charles Horton Cooley (1864–1929)
“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)