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.
in the Io, discusses name and properties of the magnet, 1, 9, 11, 18.
in the Timæus, suggests the theory of circumpulsion, 61.
his Atlantis, 159.
on life in the universe, 208.
on loadstone fables, 1, 2, 9, 18.
his mistake about Æthiopian loadstones, 17.
on the five kinds of loadstones, 9.
on the alleged discovery of the loadstones, 8.
on the alleged magnetick mountains, 18.
on a locality where loadstone was found, 11.
on the occurrence of iron in Spain, 25.
on the Sagda and the Catochites, 111.
on the silver denarius of Antony, 110.
on the use of loadstone by glass-makers, 111.
on the shadow of a gnomon of a sun-dial at Rome, 213.
Plutarch, Claudius.
on the garlick fable, 32.
says something flammable exists in amber, 54.
his theory of circumpulsion, 3, 62.
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).
his narration of marvels, 6.
on various tempering of iron, 24.
asserts loadstone a mixture of stone and iron, 63.
on his assertion that loadstones have hairs, 66.
asserts vapour to be cause of attraction, 67.
his error as to change of verticity, 73.
suspends iron upwards by a thread, 92.
his error as to centre of the orbe of virtue, 95.
his error as to the polarity which causes repulsion, 102.
his error as to magnetick opposing forces, 103.
experiment with a balance, 108.
his error as to iron being intoxicated, 138.
his error as to iron excited by a diamond, 143.
his error as to the pointing of a magnet, 144.
proportion between loadstone and iron, 149.
his error as to variation and longitude, 166.
primum mobile, the, 79, 214, 216, 218, 220, 226, 232, 237.
prostaphæresis, 174, 236.
Prutenical Tables, the, 235.
Ptolemæus, Claudius.
on loadstone fables, 2, 32.
on the occurrence of loadstone and of iron, 9,25.
on the dissolution of the earth, 91, 217, 218.
alleged relation of regions with the planets, 137.
on the elevation of the pole at different latitudes, 213, 214.
on the Primum Mobile, and the diurnal movement of the stars, 216, 228, 234.
on the anomalies of the earth's motion, 237.
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.
on cause of magnetick direction, 5, 64, 153.
on a fall of meteorick iron, 26.
on preservation of loadstones, 37.
on amber, 47.
on magnetick attraction, 70.
admits the loadstone to have a soul, 68.
on diamond attracting iron, 112.
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.
