298 



INDEX 



Equilibrium, 176 



sense, 285 

 Equinoxes, 184 

 Esophagus, 269 

 Evaporation 55, 101 



conditions affecting, 101 



effects of, 103 

 Evolution, 223 



organic, 225 

 Excretion, 280 



conditions affecting, 282 

 Exercise, 241 

 Explosions, 74 

 Eye and color, 164 



Fahrenheit degrees, 49 



Families, plant and animal, 218 



Fauna, 220 



Fever, 278 



Filters, 139 



Fire extinguishers, 77 



Fireless cooker, 88 



Flocculation, 139 



Flora, 220 



Flower, 216 



Fluids, 19 



Fluorescence, 162 



Fluoroscope, 163 



Focus, 152 



Fog, 109 



Food, 250 



making, 213 



values, 251 



Formulas, chemical, 26 

 Fossils, 223 

 Freckles, 276 

 Freezing, 47 

 Friction, 174 



effect of oil on, 175 



Friction, rolling, 174 



sliding, 174 

 Frost, 109 



convection and, 198 



effect of, 57 

 Fulcrum, 189 



Gall bladder, 255 



Gametes, 216 



Gas, effect of heat on, 19 



engine, 70 

 Gases, 14 



and vapors, 103 



colors of, 103 



compression of, 67 



cooled by expansion, 68 



effect of compression on, 67 



expansion of, 55 

 Gastric juice, 255 

 Genera, 218 

 Geology, 2 

 Glands, 215 



of the skin, 277 



sebaceous, 277 



sweat, 277 



tear, 288 



Globe, locating points on, 181 

 Glycogen, 261 

 Gooseflesh, 277 

 Grams, 35 

 Gravity, 175 



center of, 176 



specific, 40 

 Growth, 213 

 Gulf stream, 298 



Habitats, 225 

 Haemoglobin, 261 



