on fall of Mount Grenier, 782.

Bakewell, Mr. jun., on Falls of Niagara, 217.

Bakie loch, charae fossil in, 767.

Baku, inflammable gas of, 11, 355.

Balaruc, thermal waters of, 259.

Baldassari, on Sienese fossils, 39.

Balize, mouth of Mississippi, 263, 272.

Baltic Sea, lowering of level of, 520.
----, drifting of rocks by ice in, 219, 231.
----, currents on its shores, 330.

Banks of Mississippi higher than alluvial plain, 266.

Baobab tree, its size, probable age, &c., 422.

Barbadoes, rain diminished by felling of forests in, 713.

Barren Island described, 447.

Barrow, Mr., on a bank formed in sea by locusts, 675.

Barrow, Mr. jun., on the Geysers of Iceland, 247.

Barton, Mr., on geography of plants, 612.

Basalt, opinions of the early writers on, 48, 71.

Batavia, effects of earthquake at, 502.

Baton Rouge, in Louisiana, 265.

Bay of Bengal, its depth, recent deposits in, &c., 279.

Bayfield, Capt., on geology of Lake Superior, 254.
----, on drifting of rock by ice, 221, 230.
----, on bursting of a peninsula by Lake Erie, 333.
----, on earthquakes in Canada, 470.

Beaches, raised, 184.

Beachey Head, 317.

Bears, once numerous in Wales, 683.
----, black, migrations of, 637.
----, drifted on ice, 679.

Beaufort, Sir F., on gain of land in Asia Minor, 260.
----, on rise of tides, 291.

Beaumont, M. Elie de, geological map of France, 122.
----, on pentagonal network of mountain chains, 170.
----, his theory of contemporaneous origin of parallel
mountain chains considered, 163.
----, on structure and origin of Etna, 400, 416.
----, on sand-dunes, 307.
----, on inroads of sea in Holland, 327.

Beaver once inhabited Scotland and Wales, 683.
----, fossil in Perthshire, 752.
----, lake formed by, in New Brunswick, 716.

Beche, Sir H. de la. See De la Beche.

Bee, migrations of the, 655.

Beechey, Capt., upheaval of Bay of Conception, 500.
----, on drifting of canoes, 662.
----, on temple of Ipsambul, 727.
----, on coral islands, 780, 782, 787.
----, on changes of level in Pacific, 788.
----, on dead coral in Elizabeth Island, 794.

Beila, in India, mud volcanoes, 449.

Belcher, Sir E., on upheaval of Conception, 500.
----, on strata forming off coast of Africa, 774.

Bell, Mr., on the Dog, 585.

Bell rock, stones thrown up by storms on, 302.

Belzoni,