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:
“In our governments the real power lies in the majority of the community, and the invasion of private rights is chiefly to be apprehended, not from the acts of government contrary to the sense of the constituents, but from the acts in which government is the mere instrument of the majority.”
—James Madison (1751–1836)
“Liberal—a power worshipper without power.”
—George Orwell (1903–1950)
“The imagination is man’s power over nature.”
—Wallace Stevens (1879–1955)