depth in AEgean Sea, 649.
----, on migration of mollusca, 651.
----, cited, 703.

Forbes, Prof. J. D., on glacier motion, 224.
----, on rate of flowing of lava, 378, 400.
----, on temple of Serapis, 515, 517.

Forchhammer, Dr., on boulders drifted by ice, 231.
----, on peat, 719.

Forests, influence of, 712, 713, 715.
----, sites of, now covered by peat, 720.
----, destroyed by insects, 717.
----, submarine, 303, 323, 746.

Forests, submerged. In Colombia R. by landslides, 215.

Forfarshire, waste of coast of, 302.
----, marl lakes of, 766, 796.

Forshey, Mr., on Mississippi, 264, 271.

Forster, Mr., on coral reefs, 778.

Forsyth on climate of Italy, 395.

Fortis cited, 42.
----, views of Arduino confirmed by, 48.
----, and Testa on fossil fish, 44.

Fort William, near Calcutta, artesian well, 280.

Fossiliferous formations, breaks in the series, 180.

Fossilization of organic remains on emerged land, 718, 775.
----, in peat mosses, 722.
----, In caves and fissures, 732.
----, in alluvium and landslips, 730.
----, in volcanic formations on land, 349, 728.
----, in subaqueous deposits, 742, 753.
----, in marl lakes, 752.

Fossils, early speculations concerning their nature, 19, 24 to 27.
----, distinctness of secondary and tertiary, 119.
----, mammiferous of tertiary eras, 137, 140.
----, why distinct in successive groups, 190.
----, _See_ Organic Remains.

Fossil trees, upright position of some, 91.

Fourier, Baron, on temperature of spaces surrounding
our atmosphere, 108.
----, on central heat, 127.
----, on radiation of heat, 127.

Fox, Mr., on heat in mines, 538.
----, on electric currents in the earth, 543.

France, waste of coast of, 324.
----, caves of, 737.

Franconia, caves of, 736.

Franklin, on a whirlwind in Maryland, 619.

Fremont, Capt., on submerged forests in Columbia, 270.

Freshwater plants and animals fossilized, 766, 768.
----, strata in Cashmere, 762.

Freyberg, school at, 46, 52.

Fries, on dispersion of cryptogamic plants, 620.

Fringing reef, nature and origin of, 785.
----, upraised, 794.

Fuchsel, opinions of, 1762, 43.

Funchal. rise of sea at, during earthquake, 496.

Fundy, Bay of, wave called the "bore" in, 332.

G.

_Gaillonella ferruginea_, 722.

Galapagos, peculiar character of the fauna of 139, 635, 643.
----, islan