INDEX. CXX111 



the pendulum. To Note 139, on the depth of the stratum of invariable tem- 

 perature within the tropics. To Note 143, on magnetic disturbances. To 

 Note 158, on the isodynamic magnetic lines. To Note 160, on the greatest 

 and least intensity observed on the globe. To Note 166, on magnetic obser- 

 vatories and expeditions. To Note 179, on luminous fogs, mists, and clouds, 

 and their connection with aurora. To Note 373, on oceanic currents. To 

 Note 381, on the lunar atmospheric tide at St. Helena. To Note 382, on 

 barometric variations. 



Ehrenberg, infusoria in polishing slate, chalk, and other mineral substances, 

 p. 28, 141, 265, 343; Notes 308, 421,424, 425, 426. Infusoria in the ocean 

 and polar ice, p. 341. On the peculiar structure of chalk, Note 276. 



and Humboldt, summer range of tigers in Asia, p. 348 ; Note 430. 



Electricity, its connection with magnetism, p. 175, 176, 179; Notes 163, 167; 

 Atmospheric electricity, p. 308, 333336 ; Notes 409 1!8. 



Electro-magnetic currents and electro-magnetism, p. 32 ; Note 167. 



Elevation (Von Buch's theory of the elevation of) mountain chains and of conti- 

 nents, p. 27, 286. See Mountains, and Beaumont (Elie de.) 

 ndogenous, see Rocks. 



Ellicott, Cumana fall of meteors in 1799, p. 115; Note 72. 



Encke, computation of the point in space from which the aerolites of the great 

 shower of 1833 proceeded, p. Ill ; Note 66. (Also, see Comets.) 



Ennius, p. 57 ; Note 28. 



Epicharmus, p. 57 ; Note 28. 



Eratosthenes, p. 281, 283. 



Erman (Adolph), on the three cold days of May, p. 123 ; Note 86. On declination 

 lines in Asia, &c. p. 171; Note 152. On the magnetic intensity, p. 175; 

 Notes 158 (Editor), 160. Non-disturbance of the horary variations of the 

 barometer and declination needle during an earthquake, p. 193. Isoclinal 

 magnetic lines, Note 158 (Editor). 



Erratic blocks, p. 274. 



Eruptions (volcanic) of various substances from the earth, lavas, mud, water, 

 gas, &c. p. 147, 200302, 205207 ; Notes 193, 195, 196. 



Exogenous, see Rocks. 



Falconer, Himalaya fossil land tortoise, p. 268. 



Faraday, radiant heat, electro-magnetism, and magnetism, p. 32, 169, 175, 176; 



Note 146. Evolution of light by the action of magnetic forces, p. 179. 

 Farquharson, on the aurora, Notes 173, 177. 

 Faye, p. 101 ; Note 55. See Comets. 

 Fedorow, pendulum experiments, Note 133. 

 Feldt, aerolites, p. 114. 



Feldspar crvstals accidentally produced in a furnace, Note 293. 

 Ferdinandea, elevation of the island of, p. 231. 

 Fogs, luminous, p. 131; Note 179. Mephitic, p. 307. 

 Forster (George) difference of temperature between eastern and western coasts, 



p. 317; Note 391. 



(Reinhold) pyramidal form of continents, p. 282. 



- (Dr. Thos.) adduces an early notice of the August aerolites, Notes 71, 73. 

 Fossil remains of plants and animals, p. 251, 259274; Notes 279, 298332. 

 1 suited to a tronical climate now found in cold and temperate 



regions, p. 28. 

 Foster (Captain), pendulum experiments, Note 131. 



VOL. I. f K 



