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:
“...every woman who has any margin of time or money to spare should adopt some one public interest, some philanthropic undertaking, or some social agitation of reform, and give to that cause whatever time and work she may be able to afford ...”
—Frances Power Cobbe (1822–1904)
“He had come down, He said, to clean the earth
Of the dirtiness of war.
Now tell of why His power failed Him there?
His power did not fail. It was that, simply,
He found how much the people wanted war.”
—Gwendolyn Brooks (b. 1917)
“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)