INDEX. 



605 



J. 



Jade traffic in China, 67. 

 Japan, first Chinese voyages to, 78; 



south-pointing carts first used in, 



81. 

 Jefferson, Thomas, exp'ts on heat, 



389. 



Jeroboam, golden calves of, 29. 



Jesuits and Sarpi, 228-9. 



Jet, 43, 126, 369. 



Jews, mag. knowledge of, 29. 



John of London, 162. 



Jonson, Ben, refers to magnetism, 

 368; to protection against thun- 

 der, 509. 



Josephus, on protection of temple 

 from lightning, 565. 



Junks, Chinese, 77-78. 



K. 



Kalevala, the, 138. 



Kepler, John, 354. 



Kinnersley, Ebenezer, 540; elec. 

 lectures of, 585; exp'ts on Leyden 

 jar, 556; invents magic, picture, 

 elec. jack and elec. motor, 560; 

 re-discovers vitreous and resinous 

 elec'y, 586. 



Kircher, Athanasins, condemns Gil- 

 bert's theories, 366; criticizes Gil- 

 bert and Kepler, 355; genesis of 

 Solan goose, 365; Hebrew use of 

 magnet, 29; in vents words "mag- 

 netism" and "electro magnet- 

 ism," 365; works, 365. 



Kite experiment, Franklin's, 590. 



Kleist, Dean von, discovery of Ley- 

 den jar, 512. * 



Kouopho, 89; and Gilbert, 311; on 

 amber attraction, 74. 



Kratzenstein, Christian Gottlieb, 

 52. 



Kriiger, Johann Gottlob, 501; ob- 

 serves bleaching effect of ozone, 

 508; Von Kleist describes Ley den 

 jar to him, 513. 



L. 



Laertius, Diogenes, 34, 35. 



La Hire, De, on mercurial light, 456. 



Lake dwellings, amber in, n. 



Lange, elec'y for curative use, 503. 



Lapis lyncurius, 41. 



Lapis Solaris, 454. 



Lapps and Finns, 137. 



Latini, Bruuetto, 162. 



Leakage, magnetic, Descartes on, 

 361. 



Learning, in England and Italy 

 contrasted, 341. 



Legends of magnet, 219. 



Leibnitz on loss of Galileo's mag- 

 net, 349. 



Lemonnier, Louis G. , 530. 



Leonardus on black amber aii'l 

 lyncurium, 42, 43. 



Leopoldine Society, 490. 



Leyden Jar, Bevis' improvements 

 in, 534, 555; described by Muss- 

 chenbroeck to Reaumur, 517; dis- 

 covered by Von Kleist, 512; first 

 elec. circuit recognized in, 525; 

 Franklin's exp'ts on, 545, 558; 

 Gralath's exp'ts on, 522; improved 

 by Watson, 554, 555; in battery, 

 523; invention of ascribed to Cu- 

 naeus, 521; origin of name, 522; 

 Watson's theory of, 534. 



Library Company of Philadelphia, 

 538. 



Light, electric, Bernouilli on, 455; 

 compared to lightning, 459, 469; 

 Dufay finds identical with fire, 

 485 ; Grummert utilizes, 508 ; 

 Guericke discovers, 402; Hauks- 

 bee's luminous fountain, 459 ; 

 Hausen differentiates spark, brush 

 and glow, 494; in vacuum, 460; 

 Ludolff on, 497; Nollet's exp'ts 

 on, 527; Picard observes in ba- 

 rometer, 453. 



Light, Milton on magnetic nature 

 of, 438; theories of Hooke, Des- 

 cartes, Newton and Young, 431. 



Light magnet, the, 455. 



Lightning, and electricity, identity 

 of, Franklin on, 580; Freke, 571; 

 Gray, 486; Hauksbee, 459; Nollet, 

 573; Wall, 469; Winkler, 572; 

 Cardan on, 568 ; compared to 

 powder explosion, 570; deaths by, 

 568; Franklin's early views on, 

 580; Lester on, 575; Shakespeare 

 on, 569; Wallis on, 570. 



Lightning protection, accidental, 

 564; ancient suggestions of, 565; 

 Ben Jonson's reference to, 569; 

 Franklin on, 576, 582; St. Thomas 

 Aquinas on, 592. 



Lightning rod, denounced by Nol- 

 let, 593; erected by D' Alibard and 

 De Lor, 588, 589; Etruscan knowl- 

 edge of, 566; Franklin's des'n of, 

 582. 



