Page:On the Magnet - Gilbert (1900 translation of 1600 work).djvu/270

 siderites 8, 11, 143. siegelstein 11. silk suspension for magnetick iron, 29, 30. Silvaticus, Matthæus, 3. silver, loadstone for, 109, 110. similars, doctrine of attraction of, 50, 62. Simon Stevinus, *v bis, 167, 168. slate, magnetick properties of, 43. smeargel (emery), 22. Solinus, Caius Julius, 1, 9, 111. Solomon the King, 4. Sotacus, 9. Stadius, 213. stars are at various distances, 215. steel, 23, 39, 69, 71, 93, 95, 147. Stevinus, Simon, *v bis, 167, 168. stomoma 23, 33, 36. Strabo, 25. ''succinum. See'' amber. Sudini, or Sudavienses, 47. sulphur, electrical by friction, 48, 53, 56, 59. , *vj. , 68. Sussex, iron ore in, 22. sympathy and antipathy, 65, 68, 112.

ACITUS, Cornelius, 25. Taisner, or Taisnier, Joannes, 5, 107. Tariassiona or Tarazona, 23. terrella. testing loadstones, methods of, 108. Thales of Miletus, 11, 61, 68, 208, 210. theamedes, the, 18. Thebitius, or Thebit ben Korrah, 117, 236. Themistius, 71. Theophrastus, 1, 9, 11. Thomas Aquinas, 3, 64. tides, the cause of, 86. Tycho Brahe, 174, 229.

ARIATION of the compass, 7, 46, 79, 116, 151-163, 166, 167, 180. variation at the Azores, 4, 154, 156, 167. versorium, magnetick, definition of, *vj. use of, 13, 115, 147. versorium, non-magnetick, use of, 48, 49, 50. verticity, 28, 115, 119-147. Villa nova, Arnaldus de, 2, 7. vincentina, the, 48. Vincent's Rock, gem of, 54.

EATHER affects electricks, 48, 53, 55, 56. weighing the magnetick force, 108. Wright, Edward, his prefatory address, *iij bis, 7. wrought iron is magnetick, 29, 139.

OUTH preserved by loadstone, 32.

EILAM, the king of, 32. Zimiri, 11. Zoroaster, 209.