Equivalent 14
Euclidean geometry 1, 2, 57, 82, 86, 88, 108, 109, 113, 122 propositions of 3, 8
Euclidean space 57, 86, 122
Evershed 131
Experience 49, 60
Faraday 48, 63
FitzGerald 53
Fixed stars 11
Fizeau 39, 49, 51 experiment of 39
Frequency of atom 131
Galilei 11 transformation 33, 36, 38, 42, 52
Galileian system of co-ordinates 11, 13, 14, 46, 79, 91, 98, 100
Gaussian co-ordinates 88-90, 94, 96-100
General theory of relativity 59-104, 97
Geometrical ideas 2, 3 propositions 1 truth of 2-4
Gravitation 64, 69, 78, 102
Gravitational field 64, 67, 74, 77, 93, 98, 100, 101, 113 potential of 130, 131
Gravitational mass 65, 68, 102
Grebe 131
Group-density of stars 106
Helmholtz 108
Heuristic value of relativity#Heuristic 42
Induction 123
Inertia 65
Inertial mass 47, 65, 69, 101, 102
Instantaneous photograph (snapshot) 117