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 ALLOPIUS, Gabriellus, 3, 34, 35, 112. Fantis, Antonius de, 107. Fernelius, Joannes Franciscus, 4. Ficinus, Marsilius (or Marsiglio Ficino), 3, 7, 116 153. filings of iron, 37, 69, 90, 91, 92, 104. Filippo Costa. See Costa. fire destroys magnetick properties, 66, 67, 91, 124. flame destroys electrification, 59. flame hinders not magnetick attractions, 66. Flavius Blondus. See Blondus. flies in amber, 47. form versus matter, 52, 65. Fra Paolo, 6. Fracastorio, Hieronymo, 5, 50, 67, 71, 91, 110, 113, 152. Franciscus Maurolycus. See Maurolycus. Franciscus Rueus. See Rueus.

AGATES. See jet. Galen, 2, 9, 32, 35, 39, 46, 49, 61, 62, 63. Gallus, Marbodæus, 2, 7. garlick, its reputed antagonism to magnetism, 2, 32, 64. Gartias ab Horto, 32. Gaudentius Merula, 7. Gauricus, Lucas, 7. Geber (Jābir ibn Háiyán, Al-Tarsusī) 21. Gemma, Cornelius, 63. gems, electrick properties of, 48, 51. geniter, 47. Georgius Agricola. See Agricola. Gilbert, Adrian, 11. Gilgil Mauritanus, 19. Gioia, or Goia, of Amalfi, 4. Giulio Cæsare, 141. glass, an electrick by friction, 48, 54, 59. use of loadstone in making, 111. goat's blood, 7. Gonzalus Oviedus, 4. Goropius, Henricus Becanus, 4. Grotius, Hugo, 167, 168.

AEMATITE, 22, 51. Hali Abbas ('Ali ibn Al 'Abbás, Al Masúfí), 2, 6. Hannibal Rosetius Calaber, 3. Hariot, Thomas, 7. Heat, effect of on loadstone, 66, 67, 93, 123, 124. Helmshuda, 167. Heraclea, the city of, 8. Heraclean stone, or stone of Hercules, 8, 43, 61, 169. Heraclides, 214. Heraclitus, 208. Hermes, 209. Hermolaus Barbarus, 3. Hero of Alexandria, 58. Hipparchus, 213, 214, 234, 235, 237. Hippocrates, 8, 35, 51, 61. horizon, the magnetick, defined, 80. Horto, Gartias ab, 32. Horus, the bone of, or Os Ori, 9. hot iron not magnetick, 66. Hues, Robert, 7. Hugo Grotius, 167, 168.

NCLINATION. See dip. interposition of bodies, 53, 66, 83, 85, 89, 137. iris gem, the, 48. iron, its nature and occurrence, 19, 20, 22, 25. iron ore is magnetick, 18, 27, 38, 43. has poles, 28. islands, magnetick influence of, 5, 153, 161.

ACOBUS Severtius, 5. jet, 47, 48, 53, 55, 86. Joannes Baptista Porta. See Porta. Joannes Baptista Montanus, 2. Joannes Costæus. See Costæus. Joannes Franciscus Offusius, 46. Joannes Goia. See Gioia. Joannes Langius, 3. Joannes Taisner, or Taisnier. See Taisnier. Jofrancus Offusius, 46. Josephus Acosta, 5. Julius Cæsar Moderatus, 141. Julius Cæsar Scaliger. See Scaliger.

ENDALL, Abraham, 7, 178. Korrah, Thebitius Ben. See Bencora.

ACTANTIUS, Lucius, 219. Lagos, Rodriguez de, 177. Langius, Joannes, 3. lapis magnetis, 8. lapis specularis, muscovy stone, or mica, 11, 48, 52. latitude in relation to dip, 196, 200. Leonardus (or Leonhardus), Camillus, 3. Levinus Lemnius, 3.