Santorin, geological structure of, 445.
----, chart and section of, 442.
----, new islands in Gulf of, 441.

Saracens, learning of the, 17.

Saussure on the Alps and Jura, 45.
----, on glaciers in Alps, 223.

Savanna la Mar, swept away by sea, 731.

_Saxicava rugosa_, cosmopolite shell, 650.

Scandinavia called an island by the ancients, 520.
----, gradual rise of, 520, 563.
----, _See_ Sweden.

Scania, gradual subsidence of, 530.

Scacchi, Sig., on temple of Serapis, 516.
----, on origin of Monte Nuovo, 371.

Scheuchzer, his theory, 1708, 33.

Schmerling, Dr., on fossils in caves, 737.

Schwabe, M., on spots in the sun, 129, 544.

Sciacca, island of. _See_ Graham Island.

Scilla on organic remains, 1670, 24.

Scilla, rock of, 488.

Scoresby, Capt, on the Gulf stream, 96.
----, on formation of field ice, 108.
----, on weight of rocks transported by icebergs, 227.
----, cited, 640, 743.

Scotland, floods in, 207, 750.
----, colder climate indicated by newest tertiary strata of, 125.
----, waste of islands and coast of, 298.
----, slight earthquakes felt in, 358.
----, peat-mosses of, 720, 723.
----, marl lakes of, 752, 766, 770.

Scrope, Mr. G. P., on eruption of Vesuvius in 1822, 375.
----, on columnar basalts of Vesuvius, 385.
----, on pisolitic globules at Pompeii, 387.
----, on eruptions of Etna, 408, 410.
----, on cause of convexity of plain of Malpais, 429.
----, on connection between state of atmosphere and earthquakes, 561.

Sea does not change its level, but land, 15.
----, its influence on climate, 97.
----, area covered by, 124.
----, its encroachments on coasts, 298, 302, 324.
----, its rise and retreat during earthquakes, 407.

Sea-beaches, raised, in Ireland, 122.
----, progressive motion of, 316.

Seals, migration of, 642.

Sea-weed, banks formed by drift, 622, 770.

Secondary rocks, fossils of the, 86.
----, origin of the, 117.

Sedgwick, Professor, on the Hartz mountains, 48.
----, on tertiary deposits of the Alps, 119.
----, on the antagonist power of vegetation, 711.
----, on organic remains in fissures, 740.
----, on diluvial waves, 423.

Sediment of the Mississippi, 272.
----, laws governing deposition of, 188, 842.
----, in river water, 270.
----, of Ganges compared to lavas of Etna, 283.
----, rate of subsidence of some kinds of, 342.
----, a