3o8 



INDEX 



Clausius, 58 



Clocks, 254 



Cloud formation, 132 



Coagulation, 117, 119, 181 



Colloids, 115 et seq. 



Comets' tails, 294 



Condensation nuclei, 132 



Conduction of electricity 

 through gases, 2, 4, 9, 125 

 et seq. ; through liquids, 

 see electrolysis ; through 

 solids, 158 



Continuous waves, 226 



Cooke, 179 



Copper, 75, 78, 82 



Corona, 283 



Coronium, 284 



Corpuscles, see electrons 



Corpuscular theory of light, 220 



Crookes, SirWm,, 136, 148, 172, 

 182, 205 



Cryohydrates, 71 



Crystal structure, 141 



Curie, M. et Mme., 5, 165, 166, 

 167, 169, 191 



Dalton, 206, 212 

 Democritus, 148, 217, 218 

 Dewar, Sir J., 8, 51, 52, 60, 62, 



172, J91 

 Diamond, 141 



Diffusion, 116, 131, 204, 209 

 Dissociation, ionic, 106, 112, 



113, 118 

 Doppler's principle, 269 et seq.^ 



292, 296 

 Double stars, 275 

 Dust nuclei, 132 

 Dwarf stars, 305 

 Dyeing, 123 



Earth, age of, 286 

 Eddington, A. S., 245, 251 



Einstein, 2, 3, 246, 253, 256, 258 

 Elasticity of the sether, 222 

 Electric charge, nature of, 232, 



234 

 deflection, 142, 145 



inertia, 150 



Electrical conductivity of 

 metals, 61 



Electrolysis, 3, 94, 107 et seq. 



Electromagnetic waves, 9, 170, 

 221 et seq. 



Electrons, 4, 9, 39, 131, 147 et 

 seq., 213, 215, 217, 227, 234 



Electroscopes and electro- 

 meters, 126 



Elster, 155 



ejjH, I43» 192 



Emanations, radio-active, 173, 



175, ^77, 198 

 Energetics, 5, 24, 80, 98, 102, 



104 

 Enhanced lines, 279, 304 

 Entropy, 37 

 Equilibrium, i, 5, 8, 68 et seq., 



80 et seq., 206 

 Eutectic alloy, 76, 78 

 Evaporation, 42, 44, 52 



Faraday, 3, 43, 107, 152, 153, 

 160, 162, 227 



Fitzgerald, G. F., 253 



Fluorescence and phosphor- 

 escence, 136, 165, 172 



Fluorine, 202 



Force, 24 



Foucault, 263 



Frankland, 57 



Fraunhofer, 263 



Freezing-point curves, fig. 6, p. 

 75 ; fig- 7, p. 78 ; fig. 8, p. 

 79; fig- 9, p. 81 ; fig. 10, 

 p. 83 ; fig. iS, p. 89 



Fresnel, 221 



