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:
“To be inspired is to be moved in an extraordinary manner by the power or Spirit of God to act, speak, or think what is holy, just and true; [Enthusiasm is] A Full, but false persuasion in a man that he is inspired.”
—Henry More (1614–1687)
“What you fail to understand is the power of hate. It can fill the heart as surely as love can.”
—Earl Felton, and Richard Fleischer. Captain Nemo (James Mason)
“The general tendency of things throughout the world is to render mediocrity the ascendant power among mankind.”
—John Stuart Mill (1806–1873)