r.NDF.X. 



369 



Justiuian, conjectures on the physical 

 causes of volcanic eruptions, 243. 



Kamtz, isobarometric lines, 315; doubts 

 on the greater drrness of mountain air, 

 334. 



Kant, Emanuel, " on the theory and struc- 

 ture of the heavens," 50, 65 ; earth- 

 quake at Lisbon, 210. 



Keilhau on the ancient sea-line of the 

 coast of Spitzbergen, 296. 



Kepler on the distances of stars, 88 ; on 

 the density of the planets, 93 ; law of 

 progression, 95 ; on the number of com- 

 ets, 99; shooting stars, 113 ; on the ob- 

 scuration of the sun's disk, 132 ; on the 

 radiations of beat from the fixed stars, 

 136 ; on a solar atmosphere, 139. 



Kloden, shooting stars, 119, 124. 



Knowledge, superficial, evils of, 43. 



Krug of Nidda, temperature of the Gey- 

 eer and the Strokr intermittent fount- 

 ains, 222. 



Krusenstern, Admiral, on the train of a 

 fire-ball, 114. 



Kuopho, a Chinese physicist, on the at- j 

 traction of the magnet, and of amber, ' 

 188. 



Kupfter, majmetic stations in Northern 

 Asia, 191. 



Lamanon, 187. 



Lambert, suggestion that the direction of 

 the wind be compared with the height ; 

 of the barometer, alterations of temper- ! 

 ature, humidity, dec., 315. 



Lament, mass of Uranus, 93 ; satellites of 

 Saturn, 96. 



Language and thought, their mutual alli- 

 ance, 56 ; author's praise of his native \ 

 language, 56. 



Lansuages, importance of their study, 

 357, 359. 



Laplace, his "Systme du Monde," 48, 

 62, 92, 141 ; mass of the comet of 1770, | 

 107; OB the required velocity of masses 

 projected from the Aloon, 121, 122 ; on 

 the altitude of the boundaries of the at- 

 mosphere of cosmical bodies, 141 ; zo- 

 diacal light, 141 ; lunar inequalities, 166 ; 

 the Earth's form and size inferred from 

 lunar inequalities, 168, 169 ; his estimate 

 of the mean height of mountains, 301 ; 

 density of the ocean required to be less 

 than the earth's for the stability of its 

 equilibrium, 305 ; results of his perfect 

 theory of tides, 306. 



Latin writers, their use of the term " Mun- i 

 dus," 70, 71. 



Latitudes, Northern, obstacles they pre- 

 sent to a discovery of the laws of Na- 

 ture, 36 ; earliest acquaintance with the 

 governing forces of the physical world, 

 there displayed, 36 ; spread from thence 

 of the germs of civilization, 36. 



Latitudes, tropical, their advantages for 

 the contemplation of nature, 33 ; pow- 

 erful impressions, from their organic 

 richness and fertility, 34 ; facilities they , 

 present for a knowledge of the law* of | 



Q 



nature, 35 ; brilliant display of shooting 

 stars, 113. 



Laugier.his calculations to prove Halley's 

 comet identical with the comet of 1378, 

 described in Chinese tables, 109. 



Lava, its mineral composition, 234. 



Lavoisier, 62. 



Lawrence (St.), fiery tears, 124; meteoric 

 stream, 125. 



Leibnitz, his conjecture that the planet* 

 increase in volume in proportion to 

 their increase of distance from the 

 Sun, 93. 



Lenz, observations on the mean level of 

 the Caspian Sea, 297 ; maxima of dens 

 ity of the oceanic temperature, 304 , 

 temperature and density of the ocean 

 under different zones of latitude and 

 longitude, 306. 



Leonhard, Karl von, assumption on for- 

 mations of granular limestone, 263. 



Leverrier, planet Neptune. Sec Trans- 

 lator's note, 90, 91. 



Lewy, observations on the varying quan 

 tity of oxygen in the atmosphere, ac- 

 cording to local conditions, or the sea- 

 sons, 311, 312. 



Lichtenberg, on meteoric stones, 118. 



Liebig on traces of ammoniacal vapors in 

 the atmosphere, 311. 



Light, chromatic polarization of, 52 ; trans- 

 mission, 88; ol comets, 104-106 ; of fix- 

 ed stars, 105 ; extraordinary lightness, 

 instances of, 142-144 ; propagation of 

 153 ; speed of transit, 153, 154. See Au- 

 rora, Zodiacal Light, <fcc. 



Lignites, or beds of brown coal, 283, 284. 



Lines, isogonic (magnetic equal devia- 

 tion), 177, 181-185; isoclinal (magnetic 

 equal inclination), 178, 179, 181-185 ; 

 isodynamic (or magnetic equal force), 

 181, 185-194 ; isoaeothermal (chthoniso- 

 thermal), 219 ; isbbarometric, 315 ; iso- 

 thermal, isotheral, and isochimenal, 317, 

 327, 328, 348- 



Line cf no variation of horary declination, 

 183 ; lower limit of perpetual snow, 329- 

 332; phosphorescent, 113. 



Lisbon, earthquake of, 210, 211, 213, 214. 



Lord on the limits of the snow-line on the 

 Himalayas, 32. 



Lottin, his observations of the Aurora, 

 with Bravais and SUjerstrom, on the 

 coast of Lapland, 195, 200, 201. 



Lowenorn, recognized the coruscation of 

 the polar light in bright sunshine, 196. 



Lyell, Charles, investigations on the nu 

 merical relations of extinct and organ- 

 ic life, 274, 275 ; nether-formed or hyp- 

 ogene rocks, 249 ; uniformity of the pro- 

 duction of erupted rocks, 257. See notes 

 by Translator, 203, 244, ;S7. 



Mackenzie, description of a remarkable 



eruption in Iceland, 236. 

 Maclear on a Centauri, 88 ; parallaxes 



and distances of 'rxed stars, 153; in 



crease in brightness of i; Argo, 153. 

 Madler, planetary compression of Uranus, 



96 ; distance of the innermost satellite 



2 



