ANALYTICAL INDEX. 



Electric currents circulating round the 

 globe, ii. 121 ; their effect on animal and 

 vegetable substances, i. 386. 



Electrical experiments in Ei-gland and 

 France, i. 112. 



Electrics and non-electrics, i. 105. 



Electric kites, ii. 103, 104. 



Electric matter, discharge of i'rom the sur- 

 face cf the earth, ii. 78. 



Electric and magnetic variations, corres- 

 pondence between, ii. 155. 



Electrical machine of Otto Guericke, i. 105. 



Electric phenomena observed by the ancients, 

 i. 103. 



Electro-chemical theory, i. 379. 



Electrical state of the atmosphere favorable 

 to the process of barking trees, ii. 78. 



Electrized clouds, mutual attraction and re- 

 pulsion of, i. 533. 



Electroscope, Saussure's, ii. 150. 



Electro-magnetism, ii. 119128. 



Electro-statics, foundation of laid by Cou- 

 lomb, i. 136. 



Embroidery, gilding of, ii. 24, 25. 



Emperor Augustus's sealskin cloak as a 

 lightning protector, ii. 100. 



Encke's comet, i. 423. 



Engine-makers, ii. 520. 



Enumeration of 



Equator and poles, definition of, i. 562. 



Equestrian feats explained, ii. 216. 



Equilibrium, stable, unstable, and neutral, 

 ii. 227, 231. 



Ericsson's propeller, i. 275 ; his plan of con- 

 verting a steamer into a sailing craft, or 

 a sailing vessel into a steamer, i. 278. 



Errors of the sense of feeling, ii. 86. 



Evaporation, i. 331 ; ii. 163-176. 



Evaporation proportioned to horse-power, ii. 

 519. 



Evolution of heat by compressed air, ii. 33. 



Excitability of the London public, i. 159. 



Expansive action of steam, ii. 436. 



Eye, foramen or pupil of, i. 54; structure 

 'of, i. 223. 



f a^roni-s experiments in galvanism, i. 355. 



Fahrenheit's thermometer, ii. 138. 

 \ Fallacies, popular, ii. 85-96. 



_ 7 araday's hypothesis of the aurora, i. 98; 

 Ms researches in electro-magnetism, ii. 

 P 123. 



' Feats of the fire-kin? explained, ii. 90. 

 > Feeders, self-regulatinjr, for steam-boiler, ii. 

 , 504, 505. 



\ Fell in:,' timber, tae time for, i. 502. 

 \ Fisure, ii. 21. 

 '; Filtration, ii. 28. 

 j* Fin'-cscapes, ii. 273. 



( First electric shocks, singular effects of, i. 

 ( HO. 



\ Fishes, hrw Uiey adhere to rocks, i. 299. 

 -..-^-*- -* 



Flaccid bladder swells by the expansion of 



air, ii. 52. 



; Flame, effects of, i. 138 ; flame produced by 

 chemical combination, ii. 321; illumin- 

 ating powers of flame, ii. 324. 

 Flattering-glass explained, i. 265. 

 Flat plate, the, ii. 225. 

 Flies, how they adhere to ceilings, i. 299. 

 Floral clock, i. 56. 



Fluids, elasticity of, ii. 32 ; mechanical prop- 

 erties of, ii. 402. 

 Fly-wheel, the, ii. 461. 

 Force, ii. 22; philosophy of, ii. 208; single 



equivalent force, ii. 223. 

 Force, composition and resolution of, ii. 207- 



218. 



Force and weight, ii. 244. 

 Forked lightning, i. 538. 

 Form of the earth, i. 477. 

 Form and structure of the steam-boiler illus- 

 trated, ii. 496. 



Form and motion of light, i. 484. 

 Form and rotation of the sun, i. 72. 

 Forms of constellations, ii. 332. 

 Four-way cock, ii. 482. 

 Fragments of broken planets, i. 206. 

 Franklin's attention is drawn to the subject 

 of electricity, i. 113; his experiments and 

 letters, i. 114; his celebrated theory of 

 positive and negative electricity, i. 115; 

 analyzes the phenomena of the Leyden 

 jar, i. 116; suggests the analogy and 

 probable identity of lightning and elec- 

 tricity, i. 119; considered wild and vis- 

 ionary by the Royal society of London, 

 i. 121 ; establishes such identity by his 

 memorable kite experiment, i. 122; his 

 right to the discovery denied by M. Arago, 

 i. 123; his claim vindicated, i. 124; his 

 cold fusion, ii. 66. 

 Freezing and boiling points, determination 



of, ii. 136. 



Freezing point, i. 329. 

 Friction, probable influence of, ii. 152. 

 Fulcrum, the, ii, 247. 

 Fulgurites and vitrifications, ii. 67-69. 

 Fulminary tubes, ii. 67. 

 Fusible plugs, ii. 511. 

 Fusion and contraction of metals, ii. 65. 

 Fusee of a watch, ii. 257. 

 Fusion, the point of, ii. 188. 



G. 



Galileo's observations of Jupiter, i. 243; his J 

 investigations on the subject of stmo- * 

 spheric pressure, i. 286. 



Galvanism, i. 361-402. 



Galvanometer, or multiplier, ii. 124. 



Galvani an astronomical professor at Bo- 

 losna, i. 362; hi? experiments on the fros, 

 i. 262-263; opposed by Volta, i. 364. 



Gap in the solar system, i. 205. 



Gas, combustion of in flues, ii. 498. 



Gasometer, the, i. 303. 



Gases, ii. 494. 



