See also:

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

ESTUARY (from the See also:

• LAT

Lat. aestuarium, a See also:

• PLACE (through Fr. from Lat. platea, street; Gr. IrAar6s, wide)

place reached by aestus, the See also:

• TIDE (O. Eng. lid, cf. Ger. Zeit, time or season, connected with root of Sanskrit a-diti, endless)

tide)  , an See also:

• ARM (a common Teutonic word; the Indo-European root is ar, to join or fit; cf. the Lat. armus, shoulder, and the plural word arma, weapons, Gr. apphs, joint, and the reduplicated apapilKSV, to join)

arm of the See also:

• SEA (in O. Eng. sae, a common Teutonic word; cf. Ger. See, Dutch Zee, &c.; the ultimate source is uncertain)
• SEA, COMMAND OF THE

sea narrowing inwards at the mouth of a See also:

• RIVER

river where sea and fresh See also:

• WATER

water meet and are mixed, i.e. the tidal portion of a river's mouth . Structurally the See also:

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

estuary may represent the See also:

• LONG, GEORGE (1800-1879)
• LONG, JOHN DAVIS (1838– )

long-continued See also:

• ACTION

action of river erosion and tidal erosion confined to a narrow channel, most effective where most concentrated, or an estuary may be the drowned portion of the See also:

• LOWER

lower See also:

• PART

part of a river-valley . In a See also:

• MAP
• MAP (or MAPES), WALTER (d. c. 1208/9)

map of See also:

• BRITAIN (Gr. Hperavuml vi7vot, Bperravia; Lat. Britannia, rarely Britannia)

Britain showing sea-depths it will be observed that under the See also:

• SEVERN
• SEVERN, JOSEPH (1793-1879)

Severn estuary the sea deepens in a number of steps descending by concentric V's that become blunter towards deep water until the last is a See also:

• MERE
• MERE, ADALBERT (1838-1909)

mere indentation pointing towards the long narrow termination of the See also:

• PRESENT

present estuary . In this and in similar cases the progress of the estuary is indicated upon what is now the See also:

• CONTINENTAL

continental shelf . The See also:

• CHIEF (from Fr. chef, head, Lat. caput)

chief See also:

• INTEREST

interest in estuarine conditions is the mingling of sea and fresh water . Where, as in the Severn and the See also:

• THAMES

Thames, the fresh water meets the sea gradually the water is mixed, and there is very little See also:

• CHANGE (derived through the Fr. from the Late Lat. cambium, cambiare, to barter; the ultimate derivation is probably from the root which appears in the Gr. «a urmu', to bend)

change in salinity at high See also:

• TIDE (O. Eng. lid, cf. Ger. Zeit, time or season, connected with root of Sanskrit a-diti, endless)

tide . The fresh water flows over the See also:

• SALT (a common Teutonic word, cf. Dutch zout, Ger. Salz, Scand. salt; cognate with Gr. &Xs, Lat. sal)
• SALT, SIR TITUS, BART

salt water and there is a continuous rapid change in salinity towards the sea, for the currents sweeping in and out mix the water constantly . Where the river brings down a See also:

• GREAT

great quantity of fresh water in a narrow channel, the change of salinity at high and See also:

• LOW, SETH (1850- )
• LOW, WILL HICOK (1853- )

low water is very marked . " When, however, the inlet is very large compared with the river, and there is no See also:

• BAR
• BAR (0. Fr. barre, Late Lat. barra, origin unknown)
• BAR, CONFEDERATION OF
• BAR, FRANCOIS DE (1538-1606)
• BAR, THE

bar at the opening, the estuarine See also:

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

character is only shown at the upper end . In the See also:

• FIRTH, CHARLES HARDING (1857– )
• FIRTH, MARK (1819-1880)

Firth of Forth, for example, the landward See also:

• HALF

half is an estuary, but in the seaward half the water has become more thoroughly mixed, the salinity is almost See also:

• UNIFORM

uniform from See also:

• SURFACE

surface to bottom, and. increases very gradually towards the sea . The river-water meets the sea diffused uniformly through a deep See also:

• MASS (O.E. maesse; Fr. messe; Ger. Messe; Ital. messa; from eccl. Lat. missa)
• MASS, IN

mass of water scarcely fresher than the sea itself, so that the two mix uniformly, and the sea becomes slightly freshened througtlout its whole See also:

• DEPTH

depth for many See also:

• MILES, NELSON APPLETON (1839— )

miles from See also:

• LAND

land" (H . R .

See also:

• MILL
• MILL (O. Eng. mylen, later myln, or miln, adapted from the late Lat. molina, cf. Fr. moulin, from Lat. mola, a mill, molere, to grind; from the same root, mol, is derived " meal;" the word appears in other Teutonic languages, cf. Du. molen, Ger. muhle)
• MILL, JAMES (1773-1836)
• MILL, JOHN (c. 1645–1707)
• MILL, JOHN STUART (1806-1873)

Mill, See also:

• REALM

Realm of Nature, 1897) .