INDEX 



309 



Earthquakes, causes, 225 



effects, 225 *, 226, 227 * 



famous, 226 

 Eclipses, of the moon, 42, 43 *, 44 * 



of the sun, 42, 43 * 

 Eggs, 298, 300 * 

 Elasticity, 54 

 Electric, battery, 132 * 



cell, 132 * 



circuit, 132 



current, 133 



dry cell, 133 



lights, 136 



Electrical machine, 130 * 

 Electricity, and magnetism, 135 



current, 131 



frictional, 128 



positive and negative charges, 

 128 



statical, 129 



voltaic, 131 

 Electrodes, 132 

 Electrolysis, 148 * 

 Elements, definition, 47 



number, 47 



principal, 47 

 Elevators, 81 

 Embryo, 278 

 Energy, 58, 254 



and heat, 79 



transformation, 136 

 Engines, chemical, 145 



cylinder of, 79 



gas, 61 



steam chest of, 79 * 

 Equator, 25 

 Erosion, 202, 237 

 Eruptions, 229, 230 

 Excretion, 258 



animal, 257, 306 



of carbon dioxide, 160, 303 



of water, 269 



plant, 257, 269, 273, 274 

 Experiment, definition, 61 

 Explosions, 140 

 Explosives, 140 

 Extension, 49 



measurement, 50 * 

 Eye, 125, 126 * 

 Eye glasses, 126 



Fahrenheit thermometer, 72 



Fault, 225 



Feldspar, 171 



Fertilization of flowers, 277, 278 



Fertilizers, 164, 165 * 



Fire extinguisher, 144 *, 145 



Fish, alimentary canal, 304 * 



a type of vertebrate, 292 



breathing organs, 302 



ears, 293 



manner of taking food, 300 



nostrils, 293 



organs of taste and touch, 293 



sense organs, 292 

 Fissures, 183 

 Flexibility, 54 



Flowerless plants, 280, 281 * 

 Flowers, behavior, 283 



fertilization, 277 



pollination, 277, 278 * 



structure, 276 

 Floods, 238 * 

 Flux, 169 



Folded mountains, 203 

 Folded rock, 182, 185 *, 204 * 

 Food, 255 



amount required, 257 



need of, 257 



residue, 258 



stored in seed, 256 *, 272 



two uses, 305 

 Force, 56 



pump, 104 *, 105 

 Forces at right angles, 57, 58 * 

 Forestry, 210, 211 

 Forests, 209 



and rainfall, 212 



enemies, 212, 213 * 



importance, 214 

 Formulas, chemical, 158 

 Fossils, 188 *, 193 * 

 Freezing point, 68 

 Friction, 57 

 Fruit, 278 



Functions, definition, 255 

 Furnace, 143 * 

 Fusibility, 152 



Garden of Gods, Manitou, Colorado, 



187* 



Gases, definition, 67 

 diffusion, 94 *, 95 

 molecular motion, 93 



