INDEX 



377 



Cost of living, 209-213, 256 

 Cotton, 271-272 

 Cows, 310-311 

 Crop rotation, 313 

 Crystallization, 92 

 "Cures" for ailments, 77 

 Cyclones, 130-131 



D 



Dairying, 309-310 



Days (and nights), 148-149, 350-35 r, 

 354, 361-362 



lengths of, 354 



place of beginning, 361 



subdivisions of, 362 

 Density of bodies, 153, 357~358 



of water and ice, 88, 141 

 Diaphragm, 21-22 

 Diffusion, 98-100 

 Digestion, 6-7, 174, 219-221, 225, 



228 



Diphtheria, 39, 41 

 Disease, 31-33, 36-45, 49, 54, 58-61, 



308, 311 



Disinfection, 43~45> T 76, 208, 235 

 Dissipation, 71, 73, 80 

 Distillation, 93 



natural, 94, 106 

 Diurnal circles, 148-149, 350-351, 



354, 356, 358 

 Drowning, 23-24 

 Drugs, habit-forming, 75-80, 82 

 Dwellings, 206-209, 218 

 Dynamo, 168-172 



Earth, the, 157, 193, 349-3 54 

 Easter, 359 

 Eclipses, 337-338 

 Economic conditions, 281-296, 327 

 Education, 17,80-81, 210-212, 257, 

 284, 293-294, 298, 349 



Efficiency, 31-32, 65-69, 72-75, 83, 

 163, 167, 207, 211-213 



Eggs, 279, 299-303 

 candling of, 301 

 preservation of, 301-303 



Elasticity (and plasticity), 155 



Electric lights, 218-219 



Electricity, 168-172, 184-190 



Electrolysis, 184-190 



Electromagnets, 168-172 



Electro-plating, 170, 185-186, 190 



Embryo, 302, 315 



Emergencies, 233-239 



Emetic, 234 



Emulsion, 177, 179, 310 



Energy, 160-163 



electrical, 1 68, 172, 190, 218 

 molecular (and heat), 143, 147, 



161, 218 



of ether motion, 346-347 

 of the human body, 26-27, 29, 



31, 40, 67, 134 

 solar, 161, 217 



in relation to plants, 268, 274 

 transformation of, 160-161 

 transmission of, 160-163 



Enzymes, 174-175, 231 



Equilibrium, 165, 167 



Erosion, 103-108, 333 



Ether medium, 144, 162-163, 172, 



218, 344-348 



absorption of motion of, 147, 162 

 wave frequency in, 162 



Evaporation, 86 



Evolution, plants and animals, 302, 

 305 



Exercise, physical, 31, 36, 65-69, 72^ 



J75, 241 



Exercises (see Questions). 

 Expansion (see Volumes of bodies 



coefficient of, 141-142 

 Eyes, and their care, 10-15 



parts of, lo-n 

 Eye-strain, 12-15 



