240 
INDEX. 
Earth-pillars, picture of, 102 
Earth's state if there were no sun, 28 
Echoes, 133, 144 
Eggs, laying of queen-bee, 205 
Enemies of bees, 209 
of plants, 219 
Equisetum, or horse-tail, 181 
Erratic blocks, 122 
Ether, waves of the, 35-82 
Eustachian tube, 137 
Evaporation from rivers and seas, 77 
Evening primrose, insects visiting, 
218 
Eye, light- waves entering, 38-41 
FAIRIES, or forces of nature, 6-12 
Fairy "Life," 169 
Fairy-tales and science, 2 
Flowers bright to attract insects, 216 
times of opening of, 217 
Food of a plant, 156 
Frost bursting water-pipes, 91 
breaking up the fields, 1 1 8 
GANGES DELTA, 114 
Gas, definition of a, 15 
in coal, 188 
Gay-Lussac's balloon ascent, 58 
Geikie, Mr., cited, 117 
Geneva, mud in lake of, 121 
Geranium, fertilization of, 220 
sylvaticum, 221 
of the garden, 222 
Glacial Period, 122 
Glaciers, 94, 119 
blocks carried by, 122 
Glaisher's balloon ascent, 58, 62 
God in nature, 25 
Graphite, hardened by pressure, 187 
Grass, dew forming on, 83 
Gravesend, mud-banks at, 1 14 
Gravitation and its work, 8, 12 
Great Dismal Swamp, America, 183 
Greenland, glaciers of, 1 19 
snow-fields of, 93 
vapour carried from, 79 
Gulf of Mexico, vapour carried up 
from, 78 
HAILSTONES, how formed, 85 
Hard water, 95 
Hartshorn, spirits of, 55 
Heat, a fairy force, 8 
cut off by water- vapour, 82 
necessary to turn water into 
vapour, 92 
of the sun, 32 
work done by, 45 
imprisoned in coal, 46 
of our bodies, 46 
Helpfulness, mutual, of- insects and 
flowers, 235 
Herschel, Sir J., on the sun, 32 
Hive-bee, forming cells, 200 
Hives, ventilation of, 209 
bees cementing cracks in, 197 
Hoar-frost, 90 
Honey, carried by bee, 2OI 
secreted by flowers for bees, 
215 
use of, to the primrose, 167 
Honeysuckle, scent at night, 218 
Hooker, Sir J., on rainfall, 80 
Horse-tails and calamites, 181 
Huber on bees, 195 
Huxley, Mr., on coral, 21 
cited, 104 
Huyghens on light, 34 
ICE, formed of pressed snow, 93 
purity of, 95 
sculpturing power of, 1 19 
water-flowers in, 91 
Icebergs, 94 
