INDEX 



441 



Deltas, 308, 309 

 Density, 35 



of solids, 118 



Deposition, by streams, 308-309 

 Dew, 175 

 Dew point, 174 

 Dextrose, 392 

 Dialysis, 51 

 Dietary, 399, 402 

 Diffusion, 49, 226 

 Digestion, 328, 401 



in plants, 328 

 Diphtheria, 424 

 Dipping needle, 191 

 Diseases, 342 



in plants, 342 



infectious, 408 

 Disinfectants, 434 

 Distillation, 122, 253 

 Dog Star, 11 

 Doldrums, 164 

 Draco, 10 



Drainage, 299, 310, 311 

 Dry farming, 297, 310 

 Drying of foods, 383 

 Dynamo, 208 



Ear, 214, 216 



Earth, a planet, 1, 14-18, 23 



Ebullition, 134 



Echoes, 214 



Eclipse, 222 



Elasticity, 45, 46 



Electric arc, 203 



currents, 200, 202 



lighting, 202, 244. 



heating, 202 



bell, 206 



power, 209 



motors, 211 



Electrical charges, 193, 195, 197 

 Electricity, 191 



by friction, 191 



positive, 192 



negative, 192 



theory of, 194 



atmospheric, 199 

 Electrodes, 93 

 Electrolysis, 93, 208, 276 

 Electrolytes, 276 

 Electromagnets, 205 

 Electrons, 194, 220 

 Electrophorus, 198 

 Electroplating, 208 



Elements, 27, 247-248 

 Energy, 37, 41, 222 



kinetic, 41 



potential, 41 



of body, 379 



conservation of, 379 

 Engines, steam, 44, 70-71 

 Epidermis, 326 

 Epiglottis, 89 

 Equatorial calms, 164 

 Equilibrium, 40 



Erosion, 304, 306-307, 335, 336 

 Ether, 220 



Eustachian tube, 217 

 Evaporation, 105-106, 297, 336 

 Expansion, in solids, 130 



in liquids, 131 



in gases, 132 

 Experiment stations, 296 

 Explosives, 45 

 Eyes, 230, 235-237 



Fahrenheit scale, 98, 100, 129 



Fats, 394 



Fehling's solution, 392 



Fermentation, 269 



Ferns, 329 



Fertility, 284, 286, 291 



Fertilization, 319 



Fertilizers, 292-295 



Fibrin, 388 



Filament, 318 



Filtration, 122, 422 



Fire, origin, 264 



Fire damp, 262 



Fire extinguisher, 268 



Fireless cooker, 142 



Fishes, 358 



Flashing point, 264 



Flies, 355, 419 



Flowers, 317 



parts of, 318-319 

 Focal length, 228 

 Focus, 228 

 Food, 379 



as fuel, 380 



values, 380 



sources of, 380, 387 



preservation of, 381, 415 



transportation of, 386 



classes of, 388 



purchase of, 398 



and disease, 412 

 Foot, 30 



