367, 369, 370;
originating from the seas, 358, 375;
oscillation of, 376;
poised rocks indicating a long exemption from strong, 388;
Riobamba, in 1797, 375;
shocks of, and their effect upon people, 383;
the direct calamities of Nature, 386;
waves of, 389.

Earthworms, 317-319;
taking food underground, 319.

Eclipses, record of ancient, 130.

Electrical action in the formation of rain and snow, 164.

Elevations of seas and lands, 83.

Energy indestructible, 23.

Envelope, lower, of the sun, 74.

Equator,
diameter of our sphere at the, 62;
doldrum of the, 109;
updraught under the, 102;
uprushing current near the, 106.

Equinoxes, precession of the, 61, 62.

_Eskers_, 221.

Expansion of air contained in a hollow wall during the
passage of the storm, 114.

Experiment, illustrating consolidation of disseminated
materials of the sun and planets, 40.

Falls. See WATERFALLS.

Fault planes, 382.

Feldspar, 324.

Floods, 180, 197;
rarity of, in New England, 121;
river, frequent east of Rocky Mountains, 198.

Foehns, 121.

Forests, salicified, 124.

Fossilization, 354-356.

Fulcrum point, 95.

Galactic plane, 45.

Galongoon, eruption of, 294.

Geological work of water, 168-206.

Glacial action in the valleys of Switzerland, 224;
periods, 63, 243, 246;
in the northern hemisphere, 246;
waste, 324.

Glaciation,
effect of,
in North America, 241;
in Central America, 234;
South America, 234.

Glaciers, 207-249;
action of ice in forming, 230-232;
Alaskan, 216;
continental, 225, 239, 240;
discharge of, 220;
exploring, 220;
extensive, in Greenland and Scandinavia, 244;
former, of North America, 232, 234;
map of, and moraines near Mont Blanc, 217;
motions of, 213;
retreat of the, 228, 230, 235;
secrets of the under ice of, 221;
speed of a, 224;
study of, in the Swiss valleys, 222;
testimony of the rocks regarding, 228;
when covered with winter snows, 216;
valley, 216.

Gombridge, 1830, 74.

Gravitation, law of, 4.

Greeks' idea of the heavens, 31;
not mechanically inventive, 22.

Gulf Stream, current of the, 1