Lake Michigan, situated in the N. E. part of
the county.

Nueces River, Ts. This large river rises in a
lake, flows S. E., and empties into the Gulf of
Mexico through Corpus Christi Pass.

Nulhegan River, Vt., rises in the towns of Aver-
ill and Wenlock. The N. branch takes a S.
course through Averill, Lewis, and a part of
Bloomfield, and the W. branch flows in an
E. direction through Wenlock and a part of
Brunswick. They unite in Bloomfield, and flow-
ing S. E., fall into the Connecticut just above the
N. E. corner of Brunswick. The course of this
stream is generally rapid, except that part which
runs through Wenlock and Brunswick. Through
this and Clyde River the Indians formerly had
their navigation from Lake Memphremagog to
Connecticut River. They had a carrying-place of
about 2 miles from the head of one river to that of
the other. The Nulhegan waters about 120 square
miles, and is about 3 rods wide at the mouth.

Oak Creek, Otsego co., N. Y., the outlet of
Canaderga or Schuyler's Lake, flows S. through
the town of Otsego, and falls into the Susque-
hanna River.

Oak Creek, Milwaukee co., Wn., drains the S.
part of the county, and empties into Lake Michi-
gan.

Oalftsland, N. Y., lies S. of Long Island, in the
Great South Bay.

Oak Neck, N. Y., is situated in the town of
Oyster Bay, Queen's co., on the N. side of Long
Island.

Oakhill Landing, Livingston, Columbia co., N.
Y., is situated 5 miles S. of the city of Hudson,
on the E. side of Hudson River.

Oak Orchard Creek, N. Y., rises in Genesee co.,
flows N., and enters Lake Ontario in Orleans co.

Obed's River, Morgan co., Te. A W.. branch
of Emery's River.

Obed's River, Te., rises in two principal forks,
which unite in Overton co. It then flows in a N.
W. direction, and enters Cumberland River at
Celina.

Obion River, Te. A large extent of country is
drained by this river and its tributaries. The prin-
cipal head branches rise in Henry and Carroll
counties, and the river pursues a S. W. course
until its entrance into the Mississippi.

Oblong Creek, N. Y., rises in Dutchess co., and
falls into Ten Mile River, which enters the Hou-
satonic in the state of Connecticut.

Occohannock Creek, Va., forms part of the boun-
dary between Northampton and Accomac coun-
ties, and falls into Chesapeake Bay.

Occoquan River, Va. This stream rises in Fau-
quier and Prince William counties, flows S. E.,
separating Fairfax and Prince William counties,
and empties into the Potomac.

Ochee River, Wn. It rises in the S. E. part of
Columbia co., flows S. S. E., and empties into
Nauneesha River in Dodge co.

Ocheyedan Lake, Io. Situated near the N. border
of the state, at the head of Ocheyedan River.

Ocheyedan River, Io. It rises in Ocheyedan and
another small lake, flows S. E., and falls into the
Inyan Tankey or Little Sioux River.

Ochapah Lake, Ma. Situated E. from Marxah
Tankah Lake, and connected with the Minesota
or St. Peter's River by Tchankaska River.

Ocilla River. This river rises in the S. part of
Georgia, flows in a S. S. W. direction through

Florida, separating Madison and Jefferson coun-
ties. and empties into Appalachee Bay'.

Ocklawaha Rh'er, Fa. This river has its source
in Lake Griffin, flows N. and E., and enters St.
John's River just above Lake George.

Ockmulgee River, Ga. This river, the main
branch of the Alatamaha, rises in Gwinnett and De
Kalb counties, and flowing 200 miles in a S. S.E.
direction, is joined by the Oconee on the S. border
of Montgomery co., where they form the Alata-
maha. It is navigable to Macon for steamboats.

Oconee River, Ga, The head branches of this
river water Jackson co., and flowing in a S. S. E.
direction, it unites with the Ockmulgee 280 miles
below Mi Hedge ville, to which place it is navigable
for steamboats.

Oconto River, Brown co., Wn. It rises near
the centre of the county, flows S. and E. into
Green Bay.

Ocracofce Inlet, N. C. This is a narrow pass
from the Atlantic Ocean to Pamlico Sound.
There are 14 feet of water on the bar at low
tide, and at the side of the passage are dangerous
shoals.

Octavo Creek, Pa. and Md., separates Lancaster
and Chester counties, Pa., and falls into the Sus-
quehanna in Md., about 5 miles below the state
line.

Ogeechee River, Ga., rises in Green co., 7 miles
N. W. of Greensboro', and flows into Ossabaw
Sound, 17 miles S. of Savannah, after a course
of more than 200 miles. It is navigable for
sloops 30 or 40 miles from its mouth, and for
boats of 30 tons to Louisville, Jefferson co.

Ogunquit River, York co., Me., rises in two
branches, and enters the Atlantic just above Cape
Neddock.

Ohio River. The Ohio River, from the extent
of the area drained by its waters, the large facil-
ities which it affords to internal commerce, and
its relative position in the heart of the country,
connecting the largest maritime states with the
west, is second in importance only to the Mis-
sissippi. It is the great N. E. tributary of the
“ Father of Waters." Its general course is from
the N. E. to the S. W., making about 10° of Ion.
and 3^° of lat.; and, flowing from the border of
N. Y. through Western Pa., it separates the states
of Va. and Ky., on the S., from O., Ia., and Is.
on the N. Physically considered, the River Al-
leghany, which rises in Potter co., Pa., on the W.
slope of the Alleghany Mts., and which is navi-
gable for boats of 100 tons for 270 miles above
Pittsburg, is one river with the Ohio, although it
does not receive this name until it forms a junc-
tion with the Monongahela, another large tribu-
tary of the Ohio, coming down from the Alle-
ghanics in the opposite direction. This river,
though a less important stream than the Allegha-
ny, is about equal to it in width at their confluence,
and is navigable, at a good stage of water, for
boats of a large size for about 100 miles from
its mouth. The Ohio proper is formed by the
confluence of these two rivers at Pittsburg, where
the elevation is 680 feet above tide water, and
380 feet above the point of junction with the
Mississippi. Its average descent is not quite five
inches to the mile. Immediately below the junc-
tion the Ohio is 600 yards wide, and is a placid
and beautiful stream. The French called it La
Belle Riviere, the beautiful river. Its name, how-
ever, according to Heckewelder, is an abbreviation
of the Indian word Ohiopekhanne, meaning a