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:
“Of a truth, Knowledge is power, but it is a power reined by scruple, having a conscience of what must be and what may be; whereas Ignorance is a blind giant who, let him but wax unbound, would make it a sport to seize the pillars that hold up the long- wrought fabric of human good, and turn all the places of joy as dark as a buried Babylon.”
—George Eliot [Mary Ann (or Marian)
“The obligation of subjects to the sovereign is understood to last as long, and no longer, than the power lasteth by which he is able to protect them.”
—Thomas Hobbes (1588–1679)
“In Europe, charters of liberty have been granted by Power. In America ... charters of power [are] granted by liberty.”
—James Madison (1751–1836)