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:
“... [ellipsis in source] it is true that the world was made in six days, but it was by God, to whose power the infirmity of men is not to be compared.”
—Elizabeth I (1533–1603)
“Who would not give up wit for power and beauty?”
—Mason Cooley (b. 1927)
“The British are a self-distrustful, diffident people, agreeing with alacrity that they are neither successful nor clever, and only modestly claiming that they have a keener sense of humour, more robust common sense, and greater staying power as a nation than all the rest of the world put together.”
—Quoted in Fourth Leaders from the Times (1950)