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Pendleton county, W.Va., and flows north-east for about 140 M. until it joins the north branch. From the junction of these two streams until it reaches Harper's See also:

Ferry the Potomac river separates Maryland from West Virginia. At Harper's Ferry it receives the See also:

WATERS, TERRITORIAL

waters of the See also:

SHENANDOAH

Shenandoah river and cuts through the See also:

BLUE (common in different forms to most European languages)

Blue See also:

Ridge Mountains in a See also:

GORGE

gorge noted for its scenic beauty. From this point to its mouth it forms the boundary between Virginia and Maryland. The stream crosses the Blue Ridge Mountains at an See also:

ELEVATION

elevation of about 245 ft., and at See also:

GEORGETOWN

Georgetown (See also:

Washington), 62 m. distant, it meets tidewater. Of this descent about 90 ft. occurs about 15 M. above Washing-ton, at the See also:

GREAT

Great Falls, a See also:

SERIES (a Latin word from serere, to join)

series of rapids about a mile long and including a See also:

CATARACT (from the Lat. form cataracta of the Gr. Karapplucrgss, a floodgate, or waterfall, properly something which rushes down)

cataract about 35 ft. high. Three and a See also:

HALF

half See also:

MILES, NELSON APPLETON (1839— )

miles above Washington are the Little Falls, which See also:

mark the See also:

head of See also:

NAVIGATION (from Lat. navis, ship, and agere, to move)

navigation.

Large vessels, however, are prevented by a See also:

BRIDGE

bridge from proceeding above Georgetown. At Washington there are two channels, with respective depths at mean See also:

low See also:

WATER

water of iS and 21 ft. Large sums have been spent since 187o on improving these channels. A few miles below the See also:

CITY (through Fr. cite, from Lat. civitas)

city the river broadens into a deep tidal See also:

ESTUARY (from the Lat. aestuarium, a place reached by aestus, the tide)

estuary from 21 to 7 M. wide; and channels 24 ft. deep and zoo ft. wide through all the shoals were secured by the project of 1899. The Anacostia river, or " East Branch," which flows into the Potomac just south of Washington, is navigable for large vessels for about 2 M. and for small scows and lighters as far as Bladensburg, Md., 84 m. above its mouth; its natural channel was narrow and tortuous, and about 18 ft. deep; in 1909 improvements (begun in 1902) had procured a channel 20 ft. deep at mean low water and 380 ft. wide. The Chesapeake & See also:

OHIO

Ohio See also:

Canal, from Georgetown to Cumberland, Md., follows the Potomac closely on the Maryland See also:

side. The shipments over the Potomac above Washington in 1907 were valued at $7,596,494, and those below Washington at $21,093,800, the See also:

PRINCIPAL

principal commodities being See also:

sand and See also:

GRAVEL, or PEBBLE BEDS

gravel, See also:

ICE (a word common to Teutonic languages; cf. Ger. Eis)

ice, See also:

OILS (adopted from the Fr. oile, mod. huile, Lat. oleum, olive oil)

oils, See also:

NAVAL

naval See also:

ORDNANCE (a syncopated form of " ordinance " or " ordonnance," so spelt in this sense since the 17th century)

ordnance and supplies, and See also:

BUILDING

building and paving materials. The shipments on the Anacostia river were of much the same See also:

CHARACTER (Gr. xapareri7p, from xap&crew, to scratch)

character, and in 1907 were valued at $4,312,687.

End of Article: POTOMAC

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