III. ENGLISH INDEX · 9

existence of, 115;

Zeno on, 117

Plants, 7, 220, 229, 251

Plato, 2, 57, 78, 103 f., 112, 133, 141, 146, 148 f., 214, 245 f., 262

Plutarch, 5, 11, 14, 21, 82, 108, 119

Polykrates, 132

Poseidon, 209

Praxiades, 13

Progress, 56

Protagoras, 116

Purifications, Empedokles on, 203

Pythagoras, 23, 29, 56, 132 f.;

science of, 151

Pythagoreans, 86, 132 f.

Rainbow, 21, 69, 149, 256

Rarefaction, 9, 21, 60 f., 125

Reason, 47, 62;

authority of, 83;

‘destined,’ 61;

in the universe, 6

Sabinos, 81

Sacrifice, 53, 155, 209

Samian fleet, 120

Science, 58, 145;

of numbers, 143

Sea, the, 12, 37, 69, 179, 218, 226, 259

Sensation, 85;

validity of, 128 f., 131, 159, 226, 256

Sense-perception, 27, 60, 108, 150, 161;

theory of, 214, 217, 258 f.