INDEX. CXXV11 



Lament, mass of Uranus, p. 84. Satellites of Saturn, p. 87. 



Land, general view of the dry, p. 278294 ; Notes 335361. Its superficial extent 

 compared with that of the ocean, p. 279, 280 ; Note 335. Its distribution and 

 configuration, and the influence of these on climate and human affairs, p. 279, 

 280, 283, 285, 286, 291, 292, 315319, 322, 323 ; Notes 342344. Elevation and 

 subsidence of, occasioned by different causes and forces, p. 286290; Notes 

 348- 355. Height of the center of gravity of the, above the level of the ocean 

 in different parts of the globe, p. 293 ; Note 360. 



Language, its reaction on thought, p. 41. The German extolled, p. 41. 



Languages, p. 354, 355 ; Notes 441, 443. 



Lap'ace, Systeme du Monde, p. 31. On the mass of comets, p. 100. Ellipticity 

 of the earth inferred from the lunar inequalities, p. 157, 158 ; Note 130. In- 

 ferior density of the ocean requisite for its stable equilibrium, p. 298. Theory 

 of tides, p. 299. On the difference between the attraction of masses and mole- 

 cular attraction, Note 22. On the zodiacal light, Note 35. On the hypothesis 

 of the lunar origin of aerolites, Note 69. On the laws which determine the 

 extreme limit of the atmosphere of a rotating cosmical body, p. 130 ; Note 94. 

 On the unchanged length of the day and temperature of the earth from the 

 time of Hipparchus, p. 166; Note 140. 



Laugier, calculations shewing the identity of Halley's comet with the comet of 

 1378 mentioned in Chinese tables, p. 102 ; Notes 42, 56. 



Lava, chemical composition, p. 224; Note 222. 



Lawrence (Saint), fiery tears of, or August meteorodes, 114; Note 71. 



Lefroy (Captain), determination of the focus of greatest magnetic intensity in the 

 northern hemisphere. Note 158 (Editor). 



Lehman, on the tails of comets, Note 47. 



Leibnitz, supposed relation between the volume of planets and their distance 

 from the sun, Note 38. 



Lenz, on differences in the saline contents of different ocean zones, p. 297. 



Leonhard (Karl von), hypothesis respecting the origin of granular limestone found 

 in fissures in certain localities, p. 252 ; Note 281. 



Lewy, observations on the quantity of oxygen in the atmosphere at different 

 seasons, p. 305 ; Note 377. 



Lexell, see Comets. 



Liebig, ammoniacal vapours in the atmosphere supplying azote to plants, p. 305; 

 Note 376. 



Light, of comets, p. 97, 98. Of fixed stars (as Capella), p. 97. Independent, of 

 Venus, p. 97. Terrestrial, p. 188, 189. Polarisation and chromatic polarisa- 

 tion of, p. 37, 97. Of certain nights, p. 133 ; Notes 99, 100. Successive 

 propagation of, p. 143145; Note 121. See Aurora, Zodiacal Light, and 

 Phosphorescence of the Sea. 



Lignite, p. 273. 



Limits of physical science, p. 32, 33. Of the solar atmosphere, p. 130. 



Line of no magnetic dip or magnetic equator, p. 172174; Notes 155157. Of 

 least magnetic intensity, Editor's addition to Note 158. Of no horary varia- 

 tion of the declination, p. 1 72. Snow, or lower limit of perpetual snow, p. 326 

 330.; Notes 5, 403. 



Lines of equal magnetic intensity (or isodynamic), of equal magnetic inclination 

 (or isoclinal), and of equal magnetic declination (or isogonic), p. 170175. 

 Isodynamic, p. 170, 174, 175; Notes 158160. Isoclinal, p. 170, 172174; 

 Notes 154-156. Isogonic, p. 170, 171 ; Notes 150-152. Isobarometric, p. 



