179, 180, 202, 203, 217, 218, 

 222, 251, 252, 296, 304, 305, 

 307, 310312, 320, 321, 334, 

 336, 342344. 

 Tableau Physique des Regions 



equinoxiales, 12, 228. 

 Vues des Cordilleres, 222, 227 

 Humboldt, Willielm Von, on the pri- 

 mitive seat of Plindoo civilisation, 

 15; sonnet, extract from, 145; on 

 the gradual recognition by the hu- 

 man race of the bond of humanity, 

 368, 369. 



Humidity, 319, 340342. 

 Hutton, Capt. Thomas, his paper on 

 the snow line of the Himalayas, 

 338340. 

 Huyghens, polarization of light, 33; 



nebulous spots, 127. 

 Hygrometry, 340 342; hygrometric 

 windrose, 340,341. 



Imagination, abuse of, by half-civi- 



lized nations, 16, 17. 

 Imbert, his account of Chinese ' fire 



springs,' 149. 

 Ionian school of natural philosophy, 



47, 60, 67, 123. 

 Isogenic, isoclinal, isodynamic, &c. 



See Lines. 



Jacquemont, Victor, his barometrical 



observations on the snow line of the 



Himalayas, 11, 338. 

 Jasper, its formation, 260 262. 

 Jassen, on the gradual rise of the 



coast of Sweden, 299, 300. 

 Jorullo, homitos de, 227. 

 Justinian, conjectures on the physical 



causes of volcanic eruptions, 242, 



243. 



Kamtz, isobarometric lines, 321; 

 doubts on the greater dryness of 

 mountain air, 342. 



Kant, Emanuel, ' on the theorj r and 

 structure of the heavens,' 31,47; 

 earthquake at Lisbon, 206. 



Keilhau, on the ancient sea line of the 

 coast of Spitzbergen, 300. 



Kepler, on the distances of stars, 72 ; 

 on the density of the planets, 77, 78 ; 

 law of progression, 79 ; on the num- 

 ber of comets, 84; shooting stars, 99; 



on the obscuration of the sun's disc, 

 121 ; on the radiations of heat from 

 the fixed stars, 125; on a solar at- 

 mosphere, 128. 



Kloden, shooting stars, 107, 112. 



Knowledge, superficial, evils of, 23. 



Krug, of Nidda, temperature of the 

 Geyser and the Strokr intermittent 

 fountains, 21 9. 



Krusenstern, Admiral, on the train of 

 a fire-ball, 100. 



Kuopho, a Chinese physicist, on the 

 attraction of the magnet, and of am- 

 ber, 182. 



Kupffer, magnetic stations in Northern 

 Asia, 185. 



Lamanon, 180 



Lambert, suggestion that the direction 

 of the wind be compared with the 

 height of the barometer, alterations 

 of temperature, humidity, &c., 321. 



Lamont, mass of Uranus, 78; Satel- 

 lites of Saturn, 81. 



Language and thought, their mutual 

 alliance, 37; author's praise of hia 

 native language, t-7. 



Languages, importance of their study, 

 366, 367, 369. 



Laplace, his ' Systeme du Monde,' 28, 

 44, 76, 130; mass of the comet oi" 

 1770, 93; on the required velocity of 

 masses projected from the Moon, 108, 

 109; on the altitude of the bounda- 

 ries of the atmosphere of cosmical 

 bodies, 130; Zodiacal light, 130; 

 lunar inequalities, 158; the Earth's 

 form and size inferred from lunar 

 inequalities, 160, 161 ; his estimate 

 of the mean height of mountains, 306, 

 307; density of the ocean required 

 to be less than the earth's for the 

 stability of its equilibrium, 311; re- 

 sults of his perfect theory of tides, 

 311. 



Latin writers, their use of the term 

 ' Mundus,' 53, 54. 



Latitudes, Northern, obstacles they 

 present to a discovery of the laws of 

 Nature, 15; earliest acquaintance 

 with the governing forces of the 

 physical world, there displayed, 15 ; 

 spread from thence of the germs of 

 civilization, 15. 



Latitudes, Tropical, their advantages 



