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INDEX.
A.
Aar, glacier of the, its extent, ii. 13.
Abberley Hills, position of strata in the, i. 39. Fossils of, 142. Silurian strata of, 149.
Aberystwith, cleavage of rocks in, i. 68.
Acosta, M., on waves, ii. 242.
Acunha, Tristan d', extinct volcano of, ii. 231.
Adriatic, accession of new land on the coasts of, ii. 28. 34.
Ægean Sea, its depth, divided into eight zones, i. 337. Various species of mollusca found in, 338, et seq.
Africa, volcanos of, ii. 231.
Agassiz, M., his discoveries in fossil zoology, i. 86, 87, 88. 90, 91. 96. 157. 176. 208. 233. 270. ii. 47.
Agnano, Lago, once a volcanic crater, ii. 220.
Agriculture, successful pursuit of, dependent on a knowledge of geology, ii. 326.
Aix, freshwater deposits of, ii. 43. Insects found in, 44.
Aix-la-Chapelle, analysis of its mineral waters, ii. 256.
Albano, Mount, extinct volcano of, ii. 226.
Aldstone Moor, "flats" of, ii. 166. Lead mines of, 176. Change of the "hade" of the veins of, 191.
Aleutian Isles, reference to volcanic; phenomena in connection with the, ii. 229.
Alhama, freshwater beds of, animal deposits of the, ii. 44.
Alluvium. See Post-tertiary Strata.
Alps, dip of stratified rocks in, i. 37. Position of strata in, 39. Hypozoic strata predominant in, 58. Chalk little seen about or beyond, 58. Of Savoy, alteration of lias clays of, 68. An example of the granitic basis of the earth's crust, 108.
Altai Mountains, ii. 228.
Alte Hoffnung Gottes, temperature of the mine of, ii. 271.
Alum Bay, I. of Wight, sand rocks of, i. 250. 254.
Alumina, proportion of oxygen in,
Ambleside, mottled clay slate found at, i. 126.
America, North, fossils of, i. 143. Hall's subdivision of rocks of, 143. Cretaceous system, how developed in, 242. Volcanos of, ii. 229.
America, South, volcanos of, ii. 229. Internal sea of melted rock below a large part of, 247.
Ammonites, table of subgenera of, Amorphous masses under strata, ii. 108.
Amphitherium, new name for fossil remains of marsupials, i. 96.
Andes, their elevation attributed to volcanic action, ii. 208. Volcanos of the, 230.
Animal life, zero of, i. 339.
Animals, organic remains of, i. 69.
Articulated, 84. Tables of, found in post-tertiary strata, 304. See Organic Remains.
"Anticlinal, the Great Merioneth," of Sedgwick, i. 130.
Anticlinal Lines, their direction, ii. 292. See Strata.
Antrim, basaltic formation of, ii. 96. 128.
Apennines, dip of stratified rocks in, i. 37.
Arachnida not common as fossils, i. 85.
Arago, M., his experiments on heat, ii. 267, et seq. 308. On the temperature of Artesian wells, 276.
Ararat, Mount, volcanic character of, ii. 227.
