., on Icebergs in antarctic seas, 229.
----, on tropical plants, 614.
----, floras of islands in Southern Ocean, 615.
----, on flora of Galapagos Islands, 616.
----, on wide range of certain plants, 618, 621, 623.
----, on delta of Ganges, 280.
----, on rain in India, 200.

Hocker, Sir W., on eruption of Skaptar Jokul, 425.
----, his view of the crater of the great Geyser, 554.
----, on drifting of a fox on ice, 680.

Hopkins, Mr., on glacier motion, 224, 225.
----, on thickness of earth's crust, 536.

Hopkins, Mr., on astronomical causes of change of climate, 128.
----, on changes of climate, 93.
----, on earthquakes, 453.
----, on M. E. de Beaumont's theory of mountain chains, 170.

Hordwell, loss of land at, 318.

Horner, Mr., on brine springs, 247.
----, on submarine forest in Somersetshire, 323.
----, dissertation on coal, 91.

Horsburgh, Capt, on icebergs in low latitudes, 99.

Horsburgh on coral islands, 782, 787.

Horses drowned in rivers in South America, 750.

Horsfield, Dr., on earthquakes in Java, 471, 494.
----, on distribution of _Mydaus meliceps_ in Java, 639.

Hubbard, Prof., cited, 210.

Huc, on Yaks frozen in ice in Thibet, 85.

Human race geologically modern, 660.

Human remains in peat mosses, 722.
----, in caves, 735, 736, 739.
----, their durability, 147, 757.
----, in delta of Ganges, 757.
----, in calcareous rock at Guadaloupe, 757.
----, in breccias in the Morea, 735.

Humber, warp of the, 288.
----, encroachment of sea in its estuary, 304.

Humboldt on laws regulating diffusion of heat, 93.
----, on preservation of animals in frozen mud, 85.
----, on distribution of land and sea, 109.
----, on transportation of sediment by currents, 342.
----, his definition of volcanic action, 345.
----, on mud eruptions in the Andes, 348.
----, on volcanic eruptions in Tartary, 355.
----, on eruption of Jorullo, 428.
----, on earthquakes, 466, 470.
----, on distribution of species, 613, 614.
----, on migrations of animals, 644, 656, 685.
----, cited, 8, 77, 84.
----, on earthquake in New Madrid, 466.
----, on earthquake of Lisbon, 495.
----, on mud volcanoes, 448.

Humboldt, W. von, on dawn of oriental civilization, 659.

Humming-birds, distribution, &c., 97, 643.

Hunter, John, on mule animals, 601.

Huron, Lake, recent strata of, 768.

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