Compressed Air Work And Diving 1909
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CHAPTER IX.
Tunnelling (continued).
East River Tunnels, New York.
The most recent compressecl air tunnels are those of the
Pennsylvania Tunnel and Terminal Railroad Company in
New York.
The city of New York is built on a long narrow
island about 14 miles long and 2 wide, and runs in a
direction from north-east to south-west. It is cut off
from the mainland, or New Jersey shore, by the Hudson
River on the west, and separated from Long Island on
the east by an arm of the sea known as the East River.
The line starts from the New Jersey shore, and is
carried by means of two parallel tunnels under the H udson
River. These two tunnels are then continued under the
city to a large new central station in the centre of the
island. From this point there are four parallel tunnels,
which are also carried under the city to the west shore of
the East River, and under the river to Long Island where
they connect up with existing systems.
The business portion of New York is in the south of
the island of Manhattan, and the part corresponding to
our own west end of London is situated in the centre.
The route of the railway is located about 4 miles from
the most extreme Southern point, known as the Battery,
and forms a rough divicling line between the two djstricts,