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Pliny, 42, 52

Pluralism, 227 sqq., 357

Political activity of philosophers, Thales, 46; Pythagoras, 96 sq.; Parmenides, 195; Empedokles, 230 sq.; Zeno, 358

Polybios, 99 n. 206

Polybos, 379

Polykrates, era of, 53 n. 97, 94

Pores. See πόροι

Porphyry, 92 n. 187, 104 n. 219, 257 n. 571

Poseidonios, 19 n. 27, 81 n. 159

Precession. See Equinoxes

Proclus, commentary on Euclid, 44, 115 n. 243

Proportion, 117 sq.

Protagoras, 188, 360

Purification. See καθαρμός, κάθαρσις

Pyramids, measurement of, 45. See πυραμίς

Pythagoras, 91 sqq.; forged writings, 325

Pythagoreans, 212 sqq., 319 sqq.

Rarefaction and condensation, 77 sqq., 163, 204, 403, 412

436Religion, 85 sqq., 189, 294. See Orphicism, Monotheism, Gods, Sacrifice

Respiration, 235, 253 n. 565, 284

Rest. See Motion

Revolution, diurnal, 61, 274, 346 sq.

Rhegion, 99, 220 n. 482, 319

Rhetoric, 86, 234

Rhind papyrus, 22 sqq.

Roots, 263

Sacrifice, mystic, 104 n. 220; bloodless, 258 n. 576

Salmoxis, 93

Sanchuniathon, 19 n. 27

Sardeis, era of, 43 n. 67, 53, 75