81;
physical, 190

Finite truths, 12

Fitzgerald, 133

Formula of calculation, 45, 158

Foucault, 138, 194

Four-dimensional manifold, 86

Fresnel, 133

Future, the, 72, 177

Galileo, 139

Geometrical order, 194

Geometry, 36;
metrical, 129

Gravitation, 179 et seqq.

Gravitational field, 197

Greek philosophy, 16;
thought, 197

Gyro-compass, 194

Heath, Sir T. L., 197

Here, 107

Idealists, 70

Immediacy, 52;
of perception, 72

Impetus, 181, 182;
coefficients of, 183;
integral, 183

Inclusion, 186

Individuality, 13

Infinite events, 197, 198

Inge, Dr, 48

Ingredient, 14

Ingression, 144, 145, 148, 152

Inherence, 83

Inside, 106

Instant, 33, 35, 57

Instantaneous plane, 91;
present, 72;
spaces, 86, 90, 177

Instantaneousness, 56, 57

Intersection, locus of, 90

Intrinsic character, 80, 82, 90, 113, 191;
properties, 62

Ionian thinkers, 19

Irrelevance, infinitude of, 12

Irrevocableness, 35, 37

It, 8

Julius Caesar, 36

Junction, 76, 101

Kinetic energy, 105;
symmetry, 129

Knowledge, 28, 32

Lagrange, 140

Larmor, 131

Law of convergence, 82

Laws of motion, 137, 139;
of nature, 196

Leibnizian monadology, 150

Level, 91, 92

Light, 195;
ray of, 188;
velocity of, 131

Limit, 57

Limited events, 74

Location, 160, 161

Locke, 27

Locus, 102;
of intersection, 90

London, 97

Lorentz, H. A., 131, 133

Lossky, 47

Manifold, four-dimensional, 86;
space-time, 173

Material ether, 78;
object, 169

Materialism, 43, 70

Matrix, 116

Matter, 16, 17, 19, 20, 26

Maxwell, 131, 133

Measurableness, 196;
of nature, 193

Measurement, 96, 120, 174, 196;
of time, 65, 140

Measure-system, 196

Memory, 68

Metaphysics, 28, 32

Metrical geometry, 129

Michelson-Morley, 195

Milton, 35

Mind, 27, 28

Minkowski, viii, 131

Molecule, 32, 171

Moment, 57, 60, 88

Momental area, 103;
route, 103

Momentum, 105

Motion, 105, 114, 117, 127, 188, 192

Multiplicity, 22

Natural philosophy, 29, 30

Natural science, philosophy of, 46

Nature, 3;
apparent, 31, 39;
causal, 31, 39;
conceptual, 45;
continuity of, 59, 76;
discrimination of