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 power deserving the name is that of masses, and of governments while they make themselves the organ of the tendencies and instincts of masses.”
—John Stuart Mill (1806–1873)
“Ours is the old, old story of every uprising race or class or order. The work of elevation must be wrought by ourselves or not at all.”
—Frances Power Cobbe (1822–1904)
“The interest in life does not lie in what people do, nor even in their relations to each other, but largely in the power to communicate with a third party, antagonistic, enigmatic, yet perhaps persuadable, which one may call life in general.”
—Virginia Woolf (1882–1941)