Intuition, 148
Ions, 53
Kepler, 152
Kinetic energy, 53, 121
Lattice, 128
Laws of Galilei-Newton, 15
Law of inertia, 12, 71, 72, 170
Laws of Nature, 70, 84, 118
Leverrier, 123, 152
Light-signal, 40, 139, 143
Light-stimulus, 40
Limiting velocity (), 43, 44
Lines of force, 126
Lorentz, H. A., 24, 48, 52, 58, 59–63
——— transformation, 39, 46, 50, 108, 116, 139, 143, 144, 146
—————— (generalised), 144
Mach, E., 86
Magnetic field, 74
Manifold (see Continuum)
Mass of heavenly bodies, 159
Matter, 120
Maxwell, 49, 52, 56-59, 61
——— fundamental equations, 56, 90
Measurement of length, 101
Measuring-rod, 5, 6, 34, 95, 96, 112, 119, 121, 132, 135, 141
Mercury, 123, 152
——— orbit of, 123, 152
Michelson, 62–64
Minkowski, 65–68, 108, 147
Morley, 63, 64
Motion, 16, 70
——— of heavenly bodies, 16, 17, 52, 122, 135
Newcomb, 152
Newton, 12, 86, 122, 126, 150
Newton’s constant of gravitation, 158
——— law of gravitation, 57, 94, 127, 149
——— law of motion, 76
Non-Euclidean geometry, 128
Non-Galileian reference-bodies, 117
Non-uniform motion, 72
Optics, 15, 24, 52
Organ-pipe, note of, 17
Parabola, 9, 10
Path-curve, 10
Perihelion of Mercury, 150–152
Physics, 8
——— of measurement, 7
Place specification, 6
Plane, 1, 128, 129
Poincaré, 128
Point, 1
Point-mass, energy of, 54
Position, 9
Principle of relativity, 15–17, 23, 24, 70
Processes of Nature, 50
Propagation of light, 21, 23, 24, 36, 108, 143
—————— in liquid, 47
—————— in gravitational fields, 88
