Page:On the Magnet - Gilbert (1900 translation of 1600 work).djvu/269

 Peripateticks, the, 20, 41, 43, 45, 65, 218, 222, 225, 227, 228. perpetual motion machine, 107. Peter Peregrinus. See Peregrinus. Peter Plancius. See Plancius. Petrus Apponensis. See Abano, Pietro di. Petrus Nonius. See Nonius or Nuñez. Philolaus, 214. Philostratus, 111. Pictorio, G., 6, 49. piedramant, 11. Plancius, Peter, *v bis. planets, influence of, 20, 137, 142. plasters, magnetick, 32, 33. Plato, 3. Pliny (C. Plinius Secundus). Plotinus, 218. Plutarch, Claudius. polarity. See verticity. pole, the, elevation of, 200, 213. poles, magnetick, of a loadstone, 13, 41, 72, 81, 144. poles are not points, 12, 41, 72, 96. Polo, Marco, 4. Porta, Joannes Baptista (Giambattista della Porta). præcession of the Æquinoxes, 234, 236. primum mobile, the, 79, 214, 216, 218, 220, 226, 232, 237. prostaphæresis, 174, 236. Prutenical Tables, the, 235. Ptolemæus, Claudius. Puteanus, Gulielmus (Du Puys), 3, 63. pyrimachus (i.e., pyrites), 23. Pythagoras, 57, 208. pyxidula, 4, 181. pyxis, 3, 115, 147, 165, 172.

ADIUS, the, of the earth's orbit, 218. Rasis. See Rhazes. rays of magnetick virtue, 95. Reinoldus, Erasmus (or Rheinholdus), 213. remora, the (or sucking fish), 7, 63, 110. resin becomes electrical by friction, 48, 52. respective points, 5, 153, 161, 162. reversal of polarity, 101, 137. revolution of the globe, 46, 81, 91, 220. repulsion, electrical, denied to exist, 113. Rhazes (Muhammad ibn Zakarīyā), 34, 35. rings, on the verticity of, 129. Rodriguez de Lagos, 177. Rosetius Calaber, Hannibal, 3. Ruellius, Joannes, 7. Rueus, Franciscus (de la Rue), 6.

AFFRON of Mars, 34, 91, 93. sagda, or sagdo, the, 111. Sanuto, Livio, 5, 153, 167. sapphire, the, 48. scales of iron, 22. Scaliger, Julius Cæsar. scoria or slag of iron, 34, 35. sealing wax is electrical, 48, 53. Sebastian Cabot. See Cabot. Serapio, or Serapio Mauritania (Yuhanná ibn Sarapion), 2, 6. Severtius, Jacobus, 5. shielding, magnetick, by iron plate, 83, 85.