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:
“O to be a dragon
a symbol of the power of Heaven—of silkworm
size or immense; at times invisible. Felicitous phenomenon!”
—Marianne Moore (1887–1972)
“The power of consumer goods ... has been engendered by the so-called liberal and progressive demands of freedom, and, by appropriating them, has emptied them of their meaning, and changed their nature.”
—Pier Paolo Pasolini (1922–1975)
“The power confided in me will be used to hold, occupy and possess the property and places belonging to the government, and to collect the duties and imposts.”
—Abraham Lincoln (1809–1865)