492 



INDEX. 



Electro-chemical decomposition, 99, 



183, 198, 211, 261, 262. 

 method of detecting minute 



quantities of poison, 5 ; influence of 



electric currents of low tension, 461. 

 Electro-magnetism, researches in, 181. 

 Electro-magnets, on, 182. 

 Electrode, explanation of the term,261. 

 Electrolytes, meaning of the term, 261. 

 Electrometer, Harris's, 277. 

 Electroscope, Harris's, 277. 

 Electro-tonic, on the term, 92. 

 Elephant, on the crystalline lens of 



the, 366. 



Elliptic transcendents, theory of, 60. 



Encke (Prof.),the Royal medal award- 

 ed to, 221. 



, comet of, 197. 



Endosmometer, 61. 



Endosmose, phenomena of, 61. 



Equations of caustics, 324. 



, analysis of the roots of, 472. 



Equilibrium of fluids, on the, 20; not 

 determinable by Clairaut's theory, 

 21 ; applied to the question of the 

 figure of the planets, 22. 



Equinoxes, on the precession of the, 

 16, 52. 



Equivalent of lead, 197. 



of chlorine, 197. 



of silver, 197. 



of barium, 197. 



of nitrogen, 197. 



of mercury, 197. 



Etna, magnetical experiments on, 1 63 ; 

 account of the eruption in 1536, 316. 



Exosmose, phenomena of, 61. 



Expansion of solids, new register py- 

 rometer for measuring, 69. 



Eye, on the crystalline lens, 194, 366, 

 478. 



Bye-pieces, achromatic, 89, 284. 



Fallows (Rev. F.), notice of, 82. 

 Faraday (Prof.) on a peculiar class of 



acoustical figures, and on the forms 



assumed by particles upon vibrating 



elastic surfaces, 49. 

 , researches in electricity, 91, 95, 



161, 198, 211, 258, 259, 288, 318, 



343. 



, note relative to the charges made 



by Dr. Dayy, 318. 

 , analysis of the water of Zem- 



Zem, 333. 



, the Copley medal awarded to, 156. 



— — , the Royal medal awarded to, 349. 



Faraday (Prof.), reports on his re- 

 searches in electricity, 113, 191. 



Farquharson (Rev. J.) t registers of the 

 thermometer at Alfbrd, 330. 



on the ice formed at the bottom 



of running water, 330. 



Farre (A.) on the structure of the 

 higher forms of polypi, 479. 



Fearn (J.) on recrossed vision, 66. 



Fermentation, putrefactive, of vege- 

 table matter, 406. 



Figure of the planets, 22, 286. 



Figures, acoustical, 49, 180. 



Filtered water, plan for supplying, 36. 



Finances of the Royal Society, state- 

 ment of, 236, 307, 356, 447. 



Fish, on the temperature of, 327. 



Fisher (Rev. G.), magnetical experi- 

 ments, 163. 



on the magnetic forces, 253. 



on the nature and origin of the 



aurora borealis, 295. 



Fluid-lens telescope, Barlow's, 13, 140, 

 245. 



Fluids, friction of, 63. 



, on the equilibrium of, 20, 286. 



, on the resistance of, 199. 



Foals, on the false tongue in, 130. 



Forbes (Prof.) on the temperatures of 

 hot springs, 382. 



on the deficient rays in the solar 



spectrum, 393. 



Foster (Capt.), notice of the late, 82. 



Fox (R. W.) on the variable intensity 

 of terrestrial magnetism, and influ- 

 ence of the aurora borealis upon it, 

 37. 



on irregularities in the magnetic 



needle, and on the thermo-electricity 

 of rocks, 124. 



on the electrical relations of me- 

 tals and minerals, 317. 



Friction of fluids, on the, 63. 



Frog, two anterior lymphatic hearts 

 in, 166. 



Galvanism, theories of, called in ques- 

 tion, 100. 



Galvanometers, 173 ; common deflect- 

 ing, 181. 



Gas, chloro-nitrous, 28. 



Gaseous bodies, on the power of me- 

 tals and other solids to induce the 

 combination of, 259. 



Gases disengaged from the thermal 

 springs at Bath, on the, 254, 258. 



, elasticity of, 260. 



