INDEX. 
243 
Scent of flowers attracts insects, 
217 
Science, fairy-tales of, 2 
how to study, 18 
Sculptors, water and ice, 99, 1 1 8 
Sea-breeze and land-breeze, 69 
Sea washing away land, no 
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, 10 
Snowfields, 93 
Snow-flakes, crystallization of, 89 
Solid, definition of a, 15 
Sound, globes of, 1 32 
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, 1 79 
in coal, 178, 180 
Sprengel on insects and flowers, 
220, 226, 234 
Springs, 93 
mineral, 95 
Stalactites, 115 
Stalagmites, 116 
Stamens of a flower, 164 
Starch in plants, 154, 159 
Stars, light of the, 36 
twinkling of, 71 
Stigma of a flower, 165 
Stigmas of orchids, 231 
Stigmaria root, 175 
Stomates in leaves, 161 
Striae 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 
causing wind, 68 
how few reach the earth, 32 
made of many colours, 40 
rate at which they travel, 38 
turning water to vapour, 74, 
77 
Sunrise, 27 
Su-sex, iron worked in, 191 
Swamp, Great Dismal, 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 through 
a membrane, 157 
Trees of the coal forest, 180 
Trefoil, structure of flower of, 229 
Tumbler of water inverted, 63 
