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:
“Do thou, then breathe those thoughts into my mind
By which such virtue may in me be bred
That in thy holy footsteps I may tread:
The fetters of my tongue do thou unbind,
That I may have the power to sing of thee
And sound thy praises everlastingly”
—Michelangelo Buonarroti (1474–1564)
“There is a power whose care
Teaches thy way along that pathless coast,—”
—William Cullen Bryant (1794–1878)
“Many a reformer perishes in his removal of rubbish,—and that makes the offensiveness of the class. They are partial; they are not equal to the work they pretend. They lose their way; in the assault on the kingdom of darkness, they expend all their energy on some accidental evil, and lose their sanity and power of benefit.”
—Ralph Waldo Emerson (1803–1882)