river passes over twenty-five rapids, with an aggre-
gate fall of 165 feet. These rapids are navigable at
high water. Below Trenton the Delaware turns
to the S. W., and, passing Philadelphia, continues
this course until near its entrance into the bay.
A few miles below Philadelphia it receives the
Schuylkill, which is one of its largest tributaries,
from the N. W. The whole course of the river,
from its remotest source to its entrance into the
bay, is about 300 miles; and to its entrance into
the Atlantic, 375 miles. There are five bridges
crossing the Delaware, the lowest of which is at
Trenton. It is navigable for ships of the line to
Philadelphia, 125 miles from the ocean by the
course of the river and bay, and 45 miles from
the head of the bay. For sloops it is navigable
35 miles farther, to Trenton. The Delaware is
connected with the Hudson by two canals, the
Delaware and Hudson Canal," and the Morris
Canal." A vast amount of coal is transported
on these canals; and, aside from this immense
business, the Delaware is one of the principal
channels of internal traffic in the Eastern States.
The basin of the Delaware is about 250 miles in
length, with a mean breadth of 45 miles; com-
prehending an area of 11,250 square miles. The
surface is greatly diversified, with much difference
of relative height.
De Loma Point, Ca. A point of land on which
the town of San Diego is situated. It extends
into the Pacific just above the boundary between
Upper and Lower California.
Denny's River, Me. A small branch of the
Dernier Island, Terre Bonne parish, La. This
is the largest of a chain of long, narrow islands.
Des Moines River, Io., rises in the Coteau des
Prairies, and flowing in a S. E. direction, enters
the Mississippi just below Des Moines Bap ids,
on the boundary between Io. and Mo. In high
water it is navigable for steamboats 100 miles,
and for keel boats at all seasons.
Des Plaines River rises in the S. E. part of
Wisconsin, and after flowing through a fertile
country, mostly over a bed of limestone rock, en-
ters the Illinois Eiver.
Destruction Island, On. Situated in the Pacific
Ocean, N. W. from Greenville Point.
Detroit River is the river or strait through
which the waters of the upper lakes, Superior,
Huron, Michigan, and St. Clair, are discharged
into Lake Erie. The length of the river, from
Lake St. Clair to Lake Erie, is about 28 miles.
At its outlet from Lake St. Clair, it is over a mile
wide. Opposite to Detroit, about 8 miles below,
it is three fourths of a mile wide. Its course to
Detroit is a little S. of W.; but here it makes a
curve, and pursues a more southerly direction.
About 5 miles below Detroit, the river is divided
into two channels, by Grand Turkey Island, and
soon widens to 3 or 4 miles, and continues
of this width for 16 or 17 miles, until it opens
into the N. W. angle of Lake Erie. There are
many islands in the river, rendering the naviga-
tion somewhat intricate; nevertheless, vessels of
considerable burden can be carried through into
Lake St. Clair. The principal channel is on the
eastern side, between Boisblanc Island and the
.Canada shore. The banks of the river, in all
* its narrower parts especially, being settled and
cultivated on both sides, present a beautiful view,
in summer, to those who traverse its waters. The
principal towns on its banks are Detroit and
Brownstown on the American shore, and on the
Canada shore Sandwich and Amherstburg. It
receives from Michigan the River Rouge, about a
mile above Grand Turkey Island, and the Huron,
at the point of connection with Lake Erie. From
Canada, the only stream worthy of notice is the
Canard, which enters the Detroit about 3i miles
Devil's Hole, N. Y., is a gulf in Niagara River,
about 1 ^ miles below the falls.
Dial Mountain, Nipple Top, or Noon Mark, N. Y.,
a peak of the Adirondack range, is situated in the
town of Keene, Essex co. It is elevated 4900
feet above the Hudson.
Diamond Island, N. Y. See Lake George.
Diamond River, N. H., rises principally in Dia-
mond Pond, in Stewartstown; thence it passes
through Dixville, and after receiving several
tributaries, falls into Dead River, near its junc-
tion with the Margallaway.
Dick's River, Ky. This stream waters the W.
part of Rock Castle co., flows N. W. through
Lincoln co., separates Garrard from Boyle and
Mercer counties, and empties into the Kentucky
Dickson Creek, Ts. A small stream emptying
into the S. W. part of Galveston Bay.
Dike Creek, N. Y., rises in Steuben co., flows
W., and enters Genesee River in Alleghany co.
The N. Y. and Erie Railroad extends through
the valley of this stream for a considerable dis-
Disappointment, Cape, On. Situated at the
mouth of Columbia River.
Dismal Swamp. An extensive tract of marshy,
wooded land, lying partly in Virginia, and partly
in North Carolina. It commences a little S. of
Norfolk, Va., and extends S. 30 miles, with an ave-
rage breadth of 10 miles, covering 150,000 acres.
Some of the trees upon this tract grow to an
enormous size, and the brushwood among them
is so thick, as in some parts to be almost imper-
vious. In the midst of this swamp is the lake,
called Drummond Lake, 15 miles in circumfer-
ence, which supplies the main trunk of the Dis-
mal Swamp Canal, by a navigable feeder 5 miles
in length. This canal is 23 miles long, uniting
the waters of Chesapeake Bay with those of Pas-
quotank River, flowing into Albemarle Sound.
In the Dismal Swamp the following rivers take
their rise : the Nansemond and Elizabeth Rivers,
flowing N. into the estuary of James River; Pas-
quotank and Perquiman's Rivers, flowing into
Albemarle Sound; and some small creeks, run-
ning S. E. into Currituck Sound.
Dividing Creek, Va., separates Lancaster and
Northumberland counties, and falls into the
Doctor's Bay, Duval co., Fa. An enlargement
of St. John's River just above Black Creek.
Dog River, Vt. It is formed in Northfield by the
union of several streams, and taking a northerly
course through Berlin, falls into Winooski River,
nearly a mile below the village of Montpelier. Its
length is about 16 miles, and it waters about 80
Dorcheat Bayou. This stream rises in Hemp-
stead co., As., and flows S. into La., where it
enters Lake Bistineau.
Dolores River, Ca. A small stream flowing N.
W. into the River St. Michael.
Drake's Creek. The head branches of this
stream rise in Sumner co., Te. It flows iu a