INDEX
A
Acacia, in dune fixation, 81.
Acanthosicyos, as dune builder, 60.
Accretion and degradation, 169.
—	co-operation of plants, 198.
Afforestation of shingle, 119.
Air reefs, application of, 260, 261.
Alderney and Portland, races of, 40.
Algae of the salt marsh, 170.
A Inus glutinosa, for dune planting, 82.
—	iitcana, for reclaiming river beds, 216.
--in shingle reclamation, 118, 119,
Amsterdam, water-supply, 114.
Anarhizophytes, definition, 97.
Annual plants, 47.
Apposition beaches, 89.
Arenaria peploides, as dune builder, 60.
—	on shingle, 99.
Australia, dunes fixed, 84.
B
Barchans, 68.
Bare ground, colonization of, 51.
Bars, estuarial sand, fluctuations of, 18.
Betula verrucosa, for dune planting, 82.
Biorn Soren, early dune planting, 72.
Blakeney Point, from an engineering point of view, 218.
—	maps, 220, 221.
—	shingle beach, profile, 90.
Boat of Formidable, carried over Chesil Bank,
91.
Bouche d’Erquy, colonization by halopbytes, 189.
Brazilian coast, travel of sand along, 144-Breaches, stopping Dagenham Breach in 1721, 138, 139.
—	description of shutting up breach in Essex river, 140, 141.
278
Breaches, description of shutting up breach in Middle Level Drainage, near King's Lynn, 142.
—	shutting up, in tidal banks, 120.
—	most frequent cause of, 133.
Bristol Channel, silt in suspension, 166. British Guiana, coast-line of, 156.
--reclamation by Mangroves and Spar-
tina, 183.
Brushwood, in dune fixation, 76, 80.
—	uses of, 226.
C
Cakile maritima, 62.
Canal transport, 256 Carex arenaria, 62.
Carnarvon sea-wall, section of, 148. Cerasiium semidecattdrum, 63.
Chepstow, tidal range at, 23.
Chesil Bank, origin of, 39.
—	composition of, 40.
—	effect of Race of Portland on, 40.
—	map, 88.
—	profile, 42, 90.
Chester, weir below, 15.
Circulation of nitrogen in beach, 111.
Clay, difficulty of definition, 15.
—	ambiguity as to angle of repose, 17.
Cliff strata, buckling of, 38.
Coast-line, land drainage for, 161.
—	and sand dunes, 58, 61.
—	movements of, 65.
—	of British Guiana, 156.
—	of Jutland, protection of, 157.
--disintegration of concrete blocks on,
158.
Colonization of beaches at Blakeney Point, 224.
—	salt marsh by halopbytes, 189. Commissioners of Levels, powers of, 247. Convolvulus Soldanella on shingle, 100.