416 



INDEX. 



FARADAY on Magnetism of Crystals, 

 59. 



on solidification of gases, 112. 



on magnetization of light, 147. 



on the gymnotus, 211. 

 on dia-magnetism, 254. 

 Ferro-magnetic bodies, 255. 

 Fish Lizard, the, 341. 

 Fixed stars, light of, 122. 



Flint glass, permeability to hent, 65. 



Flora, fossil, 345. 



Flowers, influences of, 317. 



Fluid, magnetic theory of, 252. 



Fluorescence of light, 'l30. 



Forbes, Prof. Jas., on vibrations of 



heated metals, 97. 

 Forbes, Prof. Edward, on zones of 



life in the ocean, 127. 

 Forbes on colour of steam, 321. 

 Force producing motion, 9. 



a cause of motion, 17. 



molecular, 40. 



of crystallization, 61. 

 Forces, active, in matter, 3. 



balance of, 14. 



in antagonism, 407. 

 Form, change of, 2. 



of surface, influence of, on cli- 

 mate, 351. 



variety of vegetable, 359. 



Foster describes Northern Lights, 249. 



Fox, R. W., on temperature of Cor- 

 nish mines, 91. 



Franklin on atoms, 47. 



Franklin's kite experiment, 214. 



Freezing mixtures, 110. 



Freezing, remarkable phenomena of, 

 112. 



of water, 302. 

 Friction, 17. 



Frictional electricity, 199. 

 Fraunhofer's dark lines, 125. 

 Franklin's experiment on heat, 75. 

 Fusion influenced by pressure.,107. 



GALVANISM, 201. 

 Galvani's experiment, 201. 

 Gases, condensation of, 111, 290. 



Gases, magnetism of, 259. 

 Gaseous constitution, 317. 

 Gauss's theory of magnetism, 243. 

 Generation, spontaneous, 363. 

 Geological phenomena, 332. 

 Germ, Treviranus on the, 361. 

 Germination of seeds, 367. 

 Glass, coloured, transparency to heat , 6 5 . 

 Goethe's theory of colour, 139. 

 Goethe on phosphorescence, 157. 



on the leaf, 369. 

 Graham's law of diffusion, 323. 

 Gravitation, 21. 



Growth explained, 52. 

 , progress of, 364. 



defined, 383. 



Grove decomposes water by heat, 98. 

 Gulf stream, the, 81. 

 Gulielmini on crystallisation, 50. 

 Gnn cotton, 103. 

 Gymnotus electricus, 211. 

 Gyroscope, the, 14. 



HANSTREN and Arago on Northern 



Lights, 248. 



Hansteen on magnetism, 244. 

 Heat, solar and terrestrial, 62. 

 , conductors of, 90. 

 , rays absorbed by atmosphere, 63,. 



73. 



and light, their relations, 64. 

 , radiation of, 82. 



rays, coloured, 85. 



lessens chemical affinity, 88. 



latent, 101. 



, decomposition by, 109, 27C, 

 , scientific knowledge of, 114. 



developed by combustion of wood 

 equivalent to heat absorbed in 

 growth, 116. 



, influence of, on magnetism, 241. 



action of, on water, 302. 



, influence of on plants, 371. 



essential to life, 395. 

 Heliography of M. Niepce, 170. 

 Herbivorous animals, 315. 

 Herschel on the nebulae, 24. 

 Herschel, Sir "W., on heat rays, 67. 



