Chemistry furnishes causes of sudden action, also fulminating compositions, 62. Analogy of the complex phenomena of, with those of physics, 92. Benefits arising from the analysis of, 94. Axioms of, analogous to those of geometry, 95. Many of the new elements of, detected in the investigation of residual phenomena, 158. The most general law of, 209. Illustration of, 210. Between fifty and sixty elements in, 211. Objects of, 296. General heads of the principal improvements in, 302. Remarks on those general heads, 304. Chemistry, Stahlian, cause of the mistakes and confusions of, 123. Chladni, experiments of, in dynamical science, 181. Chlorine, disinfectant powers of, 56. Clarke, Dr., his experiments on the arseniate and phosphate of soda, 170. His success in producing a new phosphate of soda, 171. Climate, change of, in large tracts of the globe, alleged cause of, 145. Coals, power of a bushel of, properly consumed, 59. Quantity consumed in London, 60. Cohesion, an ultimate phenomenon, 90. Cold, qualities of, 318. Compass, mariner’s, 55. Condensation, a source of heat, 313. Conduction of heat, laws of, 205. Copernicus, effect of his discoveries on the Aristotelian philosophy, 113. Objections to his astronomical doctrines, 269. Crystallography, laws of, 123, 239. A determinate figure supposed to be common to all the particles of a crystal, 242. D’Alembert, his improvements in hydrodynamics, 236. Dalton, his announcement of the atomic theory, 305. His examination of gases and vapours, 319. Davy, Sir H., brings the voltaic pile to bear upon the earths and alkalies, 339. Deduction, utility of, 174. De l’Isle, Romé, his study of crystalline bodies, 239. Dew, causes of, investigated, 159. Effects of, on different substances, 160. Objects capable of contracting it, 161. A cloudless sky favourable to its production, 162. General proximate cause of, 163. Drummond, lieutenant, his improvement on lenses for lamps of lighthouses, 56. Dynamics, importance of, 96, 223. Earth, the orbit of,--diminution of its eccentricity round the sun, 147. Economy, political, 73. Egypt, great pyramid of, height, weight, and ground occupied by it, 60. Accuracy of the astronomical records of, 265. Elasticity, an ultimate phenomenon, 90. Electricity may be the cause of magnetism, 93. Universality of, 329. Effects of, 330. Activity of, 331. Equilibrium of, 332. Productive of chemical decomposition, 338. Empirical laws, 178. Evils resulting from, 179. Encke, professor, his prediction of the return of the comet so many times in succession, 156. Englefield, sir H., his analysis of a solar beam, 314. Equilibrium maintained by force, 222.