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:
“Swift as a shadow, short as any dream,
Brief as the lightning in the collied night,
That in a spleen unfolds both heaven and earth,
And, ere a man hath power to say “Behold!”
The jaws of darkness do devour it up.
So quick bright things come to confusion.”
—William Shakespeare (1564–1616)
“I have agreed to go into the service for the war ... [feeling] that this was a just and necessary war and that it demanded the whole power of the country; that I would prefer to go into it if I knew I was to die or be killed in the course of it, than to live through and after it without taking any part in it.”
—Rutherford Birchard Hayes (1822–1893)
“There is a power whose care
Teaches thy way along that pathless coast,—”
—William Cullen Bryant (1794–1878)