on. C., on sunk vessel near Poole, 758.
----, on submarine forest, Hampshire, 746.

Hartmann, Dr., on fossils of Hartz, 48.

Hartz mountains, 48.

Harwich, waste of cliffs at, 811.

Hatfleld moss, trees found in, 721.

Head, Sir Edmund, on temple of Serapis, 512.

Heat, laws which govern the diffusion of, 93.

Heat, whether gradual decline of, in globe, 129.
----, expansion of rocks by, 561.

Heber, Bishop, on animals of Himalaya, 81.

Hecla, columnar basalt of, 48.
----, eruptions of, 424.

Helena, St, bounded by lofty shores, 622.

Heligoland, inroads of sea on, 329.

Helix, range of species of, 650.

Henderson on eruption of Skaptar Jokul, 1783, 425.

Henderson's Island described, 788.

Henslow, Rev. Prof., on the cowslip, 590.
----, on diffusion of plants, 624.

Herbert, Hon. Mr., on varieties and hybrids in plants, 590, 605.

Herculaneum, 385, 389.

Herne Bay, waste of cliffs in, 312.

Herodotus cited, 8, 261.

Herschel, Sir J. F. W, on varying heat received
by the two hemispheres, 100.
----, on astronomical causes of changes in climate, 126.
----, on variable splendor of stars, 128.
----, on the trade-winds, 297.
----, on height of Etna, 396.
----, on form of the earth, 534.
----, on Geysers of Iceland, 555.
----, on the effects of heat on seeds, 621.
----, on the author's theory of climate, 92.

Herschel, Sir W., on the elementary matter of the earth, 533.

Hewett, Capt, on rise of tides, 291.
----, on currents, 293.
----, on banks in North Sea, 808, 840.

Hibbert, Dr., on the Shetland Islands, 299, 300.

Hilaire, M. Geof. St., on animal kingdom, 567.

Himalaya mountains, animals inhabiting the, 81.
----, height of perpetual snow on, 112.

Hindoo cosmogony, 4.
----, town buried, 731.

Hindostan, earthquakes in, 494.

Hippopotamus indicates warmth of river, 75.

Hitchcock, Report on Geol. of Massachusetts, 137.

Hoff, Von, on level of Caspian, 18.
----, on encroachments of sea, 331, 332.
----, on earthquakes, 359.
----, on human remains in delta of Ganges, 757.
----, on a buried vessel, 758.

Hoffmann, M., on lavas of Vesuvius, 379.
----, on Etna, 415, 416.

Holland, gradual sinking of coast, 327.
----, inroads of sea in, 328.
----, submarine peat in, 770.

Hooke on duration of species, 27, 28.
----, on earthquakes, 27, 29, 503.

Hooker, Dr. J