Eggs, laying of queen-bee, 205
Enemies of bees, 209 of plants, 219
Equisetum, or horse-tail, l8l
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-pipe^, 91 breaking up the fluids, 1 18
Ganges Delta, 114
Gas^ definition of a, 15 in coal, 188
Gay-Lussac's balloon ascent, 58
Gtikie, Mr., cited, 1 17
Geneva, mud in lake of, 121
Geranium, fertilization ot, 220 sylvr.ticum, 221 of the garden, 222
Glacial Period, 122
Glaciers, 94, II blocks carried by, 1 22
Giaisher's balloon ascent, 58, 62
God in nature, 25
Graphite, hardened by pressure, 187
Grass, dew forming on, 83
Gravesend. mud-banks at, I14
Gravitation and its work, 8, 12 I
Great Dismal Swamp, America, 183
Greenland, glaciers of, 119 snow-fields of, 93 vapour carried from, 79
Gulf of Mexico, vapour carried \ip 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 inio 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, 20 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, i8l
Huber on bees, 195
Huxley, Mr., on coral, 21 cited, 104
Huyghens on light, 34
• — purity of, 95
Ice, formed of pressed snow, 93 sculpturing power of, 1 19 water- flowers in, 91
Icebergs, 94
Imagination in science, J
Indian Ocean, vapour earned up from, 77
Insects attracted by scent and colour, 217 buzzing of, 1 47 visiting the primrose, 167
Iron, use of in leaves, 157 worked in Sussex, 191
Ives, Lieut., on Canons, 112
Jar, resonance in a, 145
Judd, Professor, cited, 176
Kentucky, Mammoth Cave of, 1 16
Kettle, crust in a, 105 vapour rising from a, 75
Khasia Hills, rain in, 80
Lace, photographed during lecture, 48
Lake-district, rain in the, 81
Land-breeze and sea-breeze, 69
' Landslips, 103
Lamium album, 223
Larva of bees, 203
Laws of nature, 24
Leather wetted, lifting a weight, 62
Leaves, oxygen-bubbles rising from, 158 stomates in, 161 the stomach of a plant, 161
Lepidodendrons, trees of coal, 1 78, 180, 182
Life of a plant, 170
Light, coloured spectrum of, 39 dark and light bands of, 37 of the sun, 31
-~- effect of, on plants, 45
— reflection of, 43 scattered by particles in air, 7'
Lii;lit -waves ei taring the eye, 38
Light-waves, size of, 38
Lightning, 52, 71
Lime, carbonate of, petrifying, 115
Limpet clinging to a rock, 62
Liquid, definition of a, 15
Lines in flowers, 222
Llanberis Pass, 122
Looking-glass, cause of reflection in» 43
Lotus corniculatus, 229
Lubbock, Sir J., cited, 216, 227
Lycopodium like coal-plants, 179
Lyme Regis, landslip of, 103
Magnets, attraction and repulsion of, 88
Martineau, Miss C, on echoes, 134
Mediterranean, vapour carried up from, 78
Mercury, action of, in a barometer, 6s
Metal reflecting light, 43
Meteors, height of atmospherr shown by, 59
Mississippi delta, 114
Moraines, 120
Mountains causing rainfall, 80
Mouse breathing in bell-jar, 54
Mud in river-water, 105
Musical notes, 140, 142
Nasturtium and the bee, 222
Nature and her laws, 24 — love of, 19
Neath Colliery, fossils from, 175
Newton on light, 34
Niagara Falls, 1 09-1 11
Nile plain and delta, 1 1
Nitre crystals, how to uiake, 87
Nitrogen in air, 53
Nodules in coal, 177
Noise and music, 140
Norfolk, Virginia, Dismal Swamp in, 183
Notes of music, 142
— oils in coal, 188, 189
OfL, its heat and light, 47 in plants, 154, 159, 189
Orange-cells, 154
Orchis mascula, its structure, 231
Otoliths, or ear-stones, 139
Oxygen in air, 53
O/ules of plants, 163
Pan-pipes, 145
Paper, pressure of air on square inch of, 60
Paraffin from coal, 1F9
Peat, formation of, 184
Petrifactions, 1 15
Pelargoniums, 222
Pennine Hills causing rainfall. Si
Peter Bell on a primrose, 7
Phosphoric acid, 53
Phosphorus burning in air, 53
Photography, 47
Pimpernel, closing for rain, 217
Plant-cells, 15$
Plant, food of a, 156 water rising in a, 157
Plants absorbing rain, 81 annual and perennial, 16 contrivances for proleclion in, 219 effect of light on, 45 fertilized by wind, 215 in a coal-mine, 1 74 light and heat imprisoned in,
—— 169 -remains in coal-nodules, 177
Poker, sound of a vibrating, 128
— Pollen-dust carried by bees, 215 of flowers, 227, 229
Pollen, gathering of, 201 use of, 164
Pollinia of an orchis, 231
Polyps, coral, 21
Poolers Cavern, 115
Popgun, compressing air in, 57
Potash formed, 17
Potassium in water, 16
Pot-holes, 109
Pressure, making coal hard, 187
Primrose, corolla falling off, 167
Protoplasm, 155 green granules of, 157
Primrose, the life of a, 150 two forms of, 163
Princess-bees, slaughter of, 208
Prism giving coloured light, 39
Propolis, or bee-cement, 297
Queen-bee, flight of, 202 laying eggs, 203
Queenstown, cliffs at, 1 10
Rain, causes of, 79, 80 fairies working in, 8 fall of barometer before, 66
Ravine worn by water, 107
Reflection of light, 43
Resonance in a jar, 145
Rhine, amount of lime carried by, 106
Roches moutonnees, 121
Rock hurled by waves, 117
St. John's Wood, explosion in, 133
St. Paul's railings of Sussex iron, 191 , Niagara falls only half the height of, ICQ
Salvia, bee entenng the, 225
Sap of plants, 157
Scent of flowers attracts insects,
— Science, fairy-tales of, 2 217 how to study, 18
Sculptors, water and ice, 99, 1 58
Sea- breeze and land-breeze, 69
Sea washing away land, 1 10 why salt, 96 what becomes of solid matter in, 97
Seeds, how formed, 165 oils in, 189
Selaginella, figure of, 179
Shale, piece of, with plants, 175
Shelley, cited, 143
Shell, music of the, 146
Sigillaria, 176, 180
Snow, cause of whiteness of, 90 fairies working in, 9
Snow-crystals, 90
Snow-drop fairies, lO
Snowfields, 93
Snow-flakes, crystallization of, 89
— Sound, globes of, 132
Solid, definition of a, 15 its nature, 127 reflection of, 133
Sounds of town and country, 125-° 127
Sound-waves, 131
South Ouram, coal-nodules at, 177
Spectrum, coloured, 39
Sphinx hawk-moth visiting honey- suckle, 218
Spores of club-moss, 179 in coal, 178, 180
Sprengel on insects and floweis, 220, 226, 234
Springs, 93 mineral, 95
Stalactites, 115
Stalagmites, 116
Stamens of a flower, 164
Starch in plants, 154, 159
—— twinkling of, 7
Stars, light of the, 36
Stigma of a flower, 165
Stigmas of orchids, 231
Stigmaria root, 175
Stomates in leaves, 161
StricX made by ice, 121, 122
Sugar, carbon in, 159
— candy crystals, 86
Sun, distance of the, 29
-— size of the, 29
—— heat and light of, 32
— Sunbeams, 27, 42
—— causing colour, 44
— ca ising wind, 68
— bow few reach the earth. 33
—- made of many colours, 40
~ rate at which they travel, 38 turning water to va; our, 74, 77
Sunrise, 27
Su sex, iron worked in, 191
Swamp, Great D.smal 183
Swarming of bees, 196, 206
Switzerland, glaciers of, 119 — snow and ice in, 93
Tar from coal, 189
Tennyson's * In Memoriam * cited,
192— poem of a flower, 152
Thames, drainage of, 104 mud-banks, 1 14
Thunder, noise of, 146
Trade-Winds, 69
Treacle and water mixing thro gh a membrane, 157
Trees of the coal-forest, 180
Trefoil, structure of flower of, 229
Tumbler of water inverted, 63
Tuning-forks vibrating, Water-pipes,
Turin, moraines near, 120
Twinkling of stars, 71 Water-vapour
Tymp mum of the ear, 137
Tyndall, Dr., cited, 75, 87, 91, Waves, 128, 144
rNDERCLAYS of COal, I 76
Undercliff, Isle of Wight, 103
Undulatory theory of light, 33-35
Vibration of tuning-forks, 142
Violet, structure of the, 227
Wy.LES, rain in, 81
Water, cutting power of, 105-112 -hard," 95 heat required to vaporize, 92 how it rises in a plant, 157 in U tube kept up by pressure, solid matter dissolved in, 105
\V at(T-dust, 75
VAaicrfalls, how formed, 108
Waier-llowers in ice, 91
cause of bursting of^ invisible, 75, 77 screening the sun's heat, 82 noise of the, 143, 144 of light measured, 37 of sound crossing each oth'iT, 135
Wave-theory of light, 33-35
Wax, plate of in hive, 198 formation of, 199
Weight and pressure of air, 58, 60 barometer measuring, 64-66
Wheel revolving to make musica' note, 141
Williams, Mr. T., cited, 176
Wind, cause of, 67 noise of the, 144-146 fertilizing plants, 216
Winds, land and sea, 69 , trade-, 69
Woodstock Park, echoes in, ly^
W^ork of the sunb# ^ms, 42
Young, Dr., cited 189

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