6o8 



INDEX. 



Orb of coition, Gilbert's, 302. 



Orb of virtue, Gilbert's, 272-291. 



Orpheus, 23. 



Orphic mysteries, 23. 



Otiosi, Porta's society of the, 231. 



Otocousticon, 430. 



Oviedo on mag. rocks, 204. 



Owen, epigram on Gilbert, 341. 



Ozone, bleaching effect obs'd by 



Kriiger, 508; odor obs'd by Boyle, 



415; by Hauseii, 494. 



P. 



Panaceas, magnetic, 25. 

 Paracelsus, 220; imitated by Rosi- 



crucians, 372. 

 Paris, Matthew, 157. 

 Paschal, 378. 

 Peiresc, on condition of England, 



334- 

 Penn, William, corresponds with 



Boyle, 425. 



Pensieri of Fra Paolo, 226. 

 Pennsylvania Gazette, Kinnersley's 



adv't in, 585. 

 Pepys, account of R. Society, 407; 



receives terrella, 407. 

 Peregrinus, Peter, 165; andNeckam 



compared, 174; copied by Porta, 

 .234; discoveries of, 184; field of 



force revealed by, 207; Gilbert 



refers to, 279; theories of, com- 

 pared with those of Gilbert, 278. 

 Petty, Sir W., 404. 

 Phaeton, legend of, 16. 

 Philippe de Thaun, Bestiary of, 119. 

 Philosophers, Lsertius' lives of, 34. 

 Philosophy, at time of Socrates, 37; 



beginning of, 33; cosmical in 



middle ages, 163; of Paracelsus, 



220; of Thales, 33; rise of Greek, 



44; scholastic, 118. 

 Phoenicians, compass attributed to, 



54; knowledge of magnet, 56; 



voyages for amber, 15; voyages 



in, 697 B. C., 55- 

 Phonograph, foreshadowed by 



Hooke, 429. 

 Phoronid, the, 22. 

 Phosphorus, 454; mercurial, 455. 

 Phrygia, first iron miners from, 22. 

 Physicians, mag. knowledge of 



English, 256. 

 Physiological Remains, Bacon's, 



.324- 

 Picard, Jean, observes barometer 



KgK 453. 

 Pirorganon, Winkler's, 506. 



Plato, on amber attraction, 35-36; on 

 lodestone attraction, 24; on con- 

 nection of lodestoue and amber, 

 37- 



Pliny, denounces Lyngurian stone 

 as myth, 42; legend of amber 

 attraction, 17; of Magnes, 19; on 

 foundation of Magnesia, 26; on 

 gagates, 43; on Heracleau stone, 

 27; on lodestone rings, 25; on 

 lodestone roof, 44; on magnetic 

 repulsion, 51. 



Plutarch, on amber attraction, 50; 

 on mag. repulsion, 51; on Ma- 

 netho, 28. 



Plus and minus electrification, 543. 



Po, amber on shores of, 17. 



Points, discharging effect of, obs'd 

 by Franklin, 541; elec. effect of, 

 obs'd by Guericke, 398. 



Polarity, electrical, obs'd by Guer- 

 icke, 398; magnetic, first sugges- 

 tion of, 127; magnetic, supposed 

 Egyptian knowledge of, 58; mag- 

 netic, supposed Etruscan knowl- 

 edge of, 62; of lodestone, 19; 

 Peregrinus on reversal of, 176; 

 prehistoric knowledge of, 20. 



Pole, magnetic, supposed places of, 

 204; sons of the, 164. 



Poles, ancient ideas of heavenly, 

 164; confusion of magnet and 

 earth's, 158; Gilbert's comparison 

 of the, 277. 



Porta, John Baptista, 230; first no- 

 tion of telegraph, 239; Gilbert's 

 attitude toward, 280; indebted- 

 ness of, to Peregrinus, 234; on 

 magnetic sphere of virtue, 237; 

 relations with Sarpi, 232. 



Portuguese voyages, 194. 



Power, confutation of Gran dam i- 

 cus, 405. 



Priestley, Dr., on powerful elec. 

 discharges, 505. 



Prima Forma of Aristotle, 283. 



Prime conductor, Bose invents, 496. 



Primum Mobile, 163. 



Principia, Descartes', 365. 



Printing, invention of, 193. 



Prolusiones Academicae of Strada, 



383- 



Prometheus, legend of, 565. 

 Pseudodoxia epideuiica, Browne's, 



380. 



Ptolemy on magnetic rocks, 203, 380. 

 Puritans, opposition to physical 



science, 371. 



