THE QUANTUM 
Electron, 28-30, 165-8, 252 
and light, 188 
and quantum, 171-83, 193 
charge of (see e) 
groups, 263-5 
models, 165-70 
theory, 2, 8 
Elements, Table of, 71, 76, 263-5 
Elliptic orbits, 60, 138, 259-62 
Emission of radiation, 3, 6, 8, 52, 
113, 117, 203, 240 
Energy levels, 56, 60, 64, 72, 77, 
237 
Energy quantum, 3 
Enhanced lines, 82 
Equatorial quantum number, 84,209 
Equipartition of energy, 11 
Equivalent, photo-chemical, 7 
“ Explanation ” in physics, 243 
Faraday tubes, 30, 156, 187, 203 
Ferromagnetism, 93 
Fine structure, 10, 179, 218 
constant, 56, 175-83, 193, 257 
Five dimensions, 159, 239, 240 
Fluctuations, energy, 202 
Four dimensions, 150, 173, 247 
Frequency, 3, 4, 5, 11, 47 
condition, 8, 55, 60, 147-9 
convergence, 50 
Rydberg, 8, 9, 49, 58, 59, 127, 
177, I 79, 257 
Fundamental series, 51 
Gas constant, 94, 257 
theory, 240-2 
Geodesics, 154 
Geometrical optics, 234 
Grating constant, 47-8, 257 
Ground term, 65, 81, 263-5 
Group quantum number, 66, 79, 80 
Group velocity, 201 
Gyromagnetic electron, 222 
Gyromagnetic ratio, 106-8 
h, value of, 4, 171-83, 257 
Hamiltonian dynamics, 16 
equations, 20, 252 
function, 20, 229, 234 
Heat theorem of Nernst, 12 
Heisenberg product, 229, 232 
Helium atom, 75, 132 
spectrum, 59 
Hydrogen atom, 23, 53, 127, 178, 
233, 236 
molecule, 128 
spectrum, 48, 53-9, 218, 230, 233 
Hyper-space, 150-9 
Impulse co-ordinate, 16 
Inactive gases, 74, 78, 93, 122 
Infra-red spectra, 11, 59 
Inner quantum number, 62-4, 78, 
80, 213 
Intensities of spectral lines, 214 
Interference, 191, 195, 234 
Ionization, temperature, 82 
Isomers, electronic, 82 
Invariants, 26, 153, 154 
K-radiation, 9, 72, 73 
Kinetic energy, 19, 23, 56, 163, 164 
Kinetic potential, 20 
L-radiation, 9, 72, 73 
Lagrangian function, 20 
Larmor precession, 91, 207 
Larmor’s theorem, 206, 207 
Levels, energy, 56, 60, 64, 72, 77, 237 
Light, corpuscular theory, 6, 184 
electromagnetic theory, 244 
nature of, 184 
quantum, 4, 185, 201, 240, 241, 
248 
undulatory theory, 185, 195, 202 
Lines of force (see Faraday tubes 
and quantum magnetic 
tubes) 
Lorentz transformation, 153, 154 
McLaren’s magneton, 38, 183, 216 
theorem, 41, 113 
Magnetic current, hi, 118, 120, 191, 
192 
Magnetic doublets, 215 
light quantum, 194 
lines, 45, 149 
model, Ewing’s, 33-4, 118-9 
quantum number, 80, 209, 239 
Magnetism, 12, 31-46, 83-90, 91- 
108 
in light pulse, 191-4 
in quantum, in, 117 
Magnetization, 32-4 
by rotation, 105