INDEX. cxxxiii 



August meteors, p. 115. On the mean number of aerolites, per hour, within 

 the range of vision of one individual, Note 60. 



Quotations from Arago, Notes 51, 72, 364. Aristotle, p. 136, 230. St. Augustine, 

 Note 426. Bacon, p. 37. Beaumont (Elie de), Note 272. Bembo (Cardinal), 

 Notes 21 6, 234. Burke, p. 20. Burnes (Sir Alexander), Note 60. Carus, p. 22 ; 

 Note 11. Cassini (Dominic), Note 96. Childrey, Note 91. Columbus, Notes 

 329, 374. Gilbert (William), Note 141. Goethe, p. 29, 37. Herschel (Sir John), 

 translation of part of Schiller's Walk, Note 9. Description of the two Magel- 

 lanic clouds, Note 32. Herschel (Sir Wm.), p. 142, 143, Note 121. Humboldt 

 (Alex, von), Notes 394, 420. Humboldt (Wilhelm von), p. 145, 356, 357 ; Note 

 443. Kepler, p. 91 ; Notes 34, 54, 59, 90. Jacquemont (Victor), Notes 5, 231, 

 426. Justin, Notes 234, 426. Laplace, Notes 35, 69. Newton, Note 85. 

 Gibers, Notes 83, 99. Ovid, p. 230 ; Note 230. Plato, Note 225. Pliny, Notes 

 48, 09, 149, 183, 184, 344. Poisson, Notes 63, 78. Rennell, Note 370. Saint- 

 Pierre (Bernardin de), p. 7. Schiller, p. 15 ; Note 9. Seneca, Notes 48, 228. 

 Solinus, Note 210. Tacitus, N. 433. Terzago, Note 69. 



Rain, p. 331, 332. Mean quantity at different places, Notes 405, 406. 



Reich, determination of the mean density of the earth by experiments with a 

 balance of torsion, p. 160 ; Note 136. On temperatures at depths in the mines 

 of Saxony, Note 138. 



Reinwardt and Hoffman, on volcanoes, which, during violent eruptions of scoriee, 

 hot water, and other substances, do not emit lavas, Notes 218, 240. 



Reisch (Gregorius), his Encyclopaedia, written in the 15th century, entitled, 

 Margarita Philosophies, p. 44; Note 19. 



Remusat (Abel), on the existence of active volcanoes in central Asia at a great 

 distance from the ocean, p. 232 ; Note 236. Notice of a supposed very larga 

 aerolite near the sources of the Yellow River, Note 62. 



Rennell (Major), on the equatorial current in the Caribbean Sea, Note 370. Clas- 

 sification of currents into drift and stream currents, Note 373 (Editor). 



Richard, on Cycadeae and Coniferae, Note 329. 



Richardson, on the connection of aurora with cirro-stratus, p. 182, 183. On the 

 noise supposed to be occasioned by the aurora, p. 185, 186. 



Richer, pendulum experiments, Note 25. 



Ritter (Carl), praise of his great work, entitled, Geography in relation to Nature 

 and to the History of Men, or General Comparative Geography, p. 18, 30, 54. 



Rive (De la), on the increase of temperature at depths, Note 138. On the unequal 

 distribution of heat in the atmospheric strata as a cause of atmospheric elec- 

 tricity, p. 333; Note 411. 



Robert (Eugene), ancient sea line marked at a high level on the coast of Spitz- 

 bergen, p. 287. 



Robertson, on the permanency of the magnetic declination in Jamaica since 1660, 

 Note 150. 



Rocks, fundamental classification of, p. 235238. Endogenous or erupted, p. 

 238241, 246248; Notes 247 257, 260, 261. Exogenous or sedimentary, 

 241244. Metamorphic, p. 244 257 ; Notes 258 295. Conglomerates formed 

 of detritus, p. 257, 258. General chemical constituents of, p. 258, 259. 

 Classification of fossiliferous, p. 267. 



Rose (Gustav), on the texture, composition, and appearance of different aerolites, 

 p. 121. Investigations on the structure of volcanic rocks, p. 225. On some 

 remarkable masses of granite, p. 239; Notes 249, 251, 252, 260. On crystals 



