INDEX. 



Vegetables, electrifying, Nollet's 

 exp'ts on, 527. 



Vending machine in Egyptian 

 temples, 87. 



Venice and Genoa, rivalry of, 193. 



Versorium, Gilbert's, 303. 



Vesalius, 262. 



Vincent de Beauvais, on mag. rocks, 

 101. 



Virtue, Gilbert on, 272; Guericke's 

 hypotheses of, 392; Neckam on 

 attractive, 125; Peregrinus on 

 magnetic, 177; Porta on magnetic, 

 235- 



Vitreous electricity, Dufay on, 484. 



Vitry, Cardinal de, on compass, 154. 



Voltaire on Cartesian and Newton- 

 ian theories, 509. 



Von Guericke, Otto, see Guericke. 



Von Kleist, see Kleist. 



Vortex theory, Descartes, 48, 357; 

 Plutarch on, 51. 



w. 



Wall, Dr., on resemblance of elec'y 



and lightning, 469. 

 Wallis, John, 404; Dr., on lightning, 



57- 



Ward, Bishop, 404. 



Water and earth circuit, Watson's, 

 550; circuit, Lemonniers', 532; 

 electrification of running, 489- 

 499; soul of Thales, 34. 



Watson, Dr. Wm., 508; dealings 

 with Franklin's theory, 552; with 

 Lemonnier's theory, 548 ; de- 

 termines velocity of elec'y to be 

 instantaneous, 551 ; discovers 



water and earth circuit, 550; es- 

 tablishes elec. circuits across 

 Thames and New rivers, 549; ex- 

 poses Bose's beatification, 499; 

 fires spirits by elec'y, 508; ignites 

 gas by elec'y, 508; Leyden jar 

 exp'ts, 532, 533, 554; makes cir- 

 cuit 12,276 ft. long, 555; pro- 

 visional theory of elec'y, 51; pub- 

 lishes papers, 533; urges elec. 

 research, 539. 



Wheler, Granvile, exp'ts with Gray, 

 474- 



William the Clerk, poems of, 149. 



Wilkins, Bishop, 404, 430, 436. 



Wilson, Benjamin, elec. theory of, 



554- 



Winkler, Johann Heinrich, 506; 

 attempts to measure speed of 

 elec'y, 506; elec. machine, 506; 

 identity of lightning and elec'y, 

 572; Leyden jar exp'ts, 515, 524; 

 theories of elec'y, 507, 511; Von 

 Kleist describes Leyden jar to 

 him, 513. 



Winthrop, John, 424. 



Wisbuy, 134, 146; laws of, 136. 



Wright, Edward, 265, 274, 315, 335. 



Wren, Sir Christopher, 411. 



Worship of nature, Greek, 31. 



X. 



Xenophanes and Xenomanes, Ba- 

 con's comparison of Gilbert to, 

 328. 



z. 



Zoroaster, legend of, 565. 



OF THE 



UNIVERSITY 



OF 



