INDEX 



309 



Fusion and solidification, 8, 41, 

 68 



7 Rays, 169, 170, 174 

 Galileo, 26, 30 



Gases, conduction of electricity 

 through, 4, 8, 9, 125 et seq. 

 Gay Lussac, 47 

 Geiger, 192, 206 

 Geitel, 156 

 Gelation, 117 

 Giant stars, 305 



Gibbs, Willard, i, 7, 80, 98, 124 

 Giesel, 177 

 Graham, 115, 124 

 Grating, 267 



Gravitation, nature of, 232 

 Gravity, 256 

 Guthrie, 71 

 Gyroscope, 233 



Ice, structure of, 71, 73 

 Induction and deduction, 31 

 Internal work of gases, 46 et seq. 

 Interval, 254 

 Introduction, i 



Ionic charge, 107 et seq., 134, 

 142 ^/ seq. 

 dissociation, 106, 112, 113, 



118 

 theory, 3, 8, 105, 106, 112, 



118, 126, 158 

 velocities, 108 et seq. 

 Ionium, 188 

 Ionization, 279, 304 ; of gases, 



125 et seq., 171, 230 

 Iron, 87, 279 

 Isotopes, 156, 197 



Jeans, 300, 301 

 Joule, 48, 49 



Hale, G. E., 273, 280, 281 

 Hardy, W. B., 117, 120, 181 

 Harvard Observatory, 303 

 Heaviside, 236 

 Helium, 57, 60, 91, 282 ; atom, 



242 ; liquid, 61 ; nuclei, 



202, 242. 

 Helmholtz, Von, 6, 58, 98, 108, 



162, 219 

 Hertz, 224 



Heycock, C. T., 74, 82, 83, 87 

 Hipparchus, 291 

 Hittorf, 3, 108, no 

 Huggins, Sir Wm. and Lady, 



172, 266 

 Hull, 294 



Huygens, 24, 25, 221 

 Hydrogen, atom, 242 ; light 



from sun, 280 ; nuclei, 201, 



202, 242 

 Hypnotism. 



Kahlenberg, 115 

 Kaufmann, 150, 236, 255 

 Keeler, 277 

 Kelvin, Lord, 5, 48, 49, 58, 210 



219, 233, 285 

 Kepler, 30, 291 

 Kirchhoff, 263, 264 

 Kohlrausch, 3, 108, no 



Langevin, 129 

 Langley, S. P., 269 

 Laplace, 18, 299 

 Larmor, Sir J., 4, 7, 98, 149, 

 213, 218, 234, 239, 253, 293 

 Laue, 139 

 Laws of Nature, 26, 29, 30, 32, 



34, 245 

 Leak of electricity from hot 



surfaces, 156 et seq., 287 

 Lebedef, 293 

 Le Chatelier, 78, 89 



