INDEX 



297 



Crystallization, 131 



water of, 133 

 Crystals, 15, 131 

 Cuticle, 275 

 Cyclones, 96 



D 



Darwinian theory, 255 

 Day, 11 

 Degrees, 182 

 Deliquescence, 114 

 Densities, table of, 43 

 Density, measuring, 39 

 Dermis, 275, 276 

 Dew, 109 

 Dewpoint, 106 

 Diaphragm, 241 

 Diffusion, 132 

 Digestion, 215, 250 

 Digestive juices, 254 



system, 253 

 Diminishing glass, 153 

 Dioecious plants, 217 

 Dip-needle, 196 

 Disinfectants, 233 

 Distillate, 141 

 Distillation, 140 



destructive, 142 



fractional, 142 



Distribution of living things, 220 

 Drugs, 291 



habit-forming, 292 

 Dusting, 271 

 Dyes from coal tar, 142 



E 



Earth, distances on, 182 



time on, 182 

 Earthshine, 10 



Echoes, 168 

 Eclipses, 10 

 Efflorescence, 115 

 Eggs, 216 

 Elasticity, 15 

 Electric bells, 208 



cranes, 208 



current, direction of, 206 



currents, induced, 206 



generator, 209 



light, 209 

 Electricity, frictional, 199 



positive, 200 



static, 199 



Electrified bodies, 200 

 Electrifying by induction, 201 

 Electrodes, 206 

 Electrolysis, 207 

 Electrolyte, 206 

 Electro-magnets, 207 

 Electroplating, 207 

 Electroscope, 201 

 Electrotyping, 207 

 Elements, chemical, 24 



distribution of, 25 

 Emulsions, 134 

 Energy, chemical, 19 



electrical, 19 . 



forms of, 19 



heat, 20 



kinetic, 21 



matter distinguished from, 13 



potential, 21 



radiant, 21 



sources of, 21 



Engine, internal combustion, 70 

 Engines, gas, 70 

 Enzymes, 215, 250 

 Epidermis, 275 

 Epiglottis, 270 

 Equator, 181 



