tricitv of the air near high, vater- 

 falls,'344. 



Translator, notes by, 7 ; on the in. 

 crease of the earth's internal heat 

 with increase of depth, 25 ; siliceous 

 infusoria and animalculites, 26; che- 

 mical analysis of an aerolite, 45, 

 46; on the recent discoveries of 

 planets, 74 76; observed the comet 

 of 1843, at New Bedford, Massa- 

 chussetts, in bright sunshine, 86 ; on 

 meteoric stones. 97; on an MS., 

 said to be in the library of Christ's 

 College, Cambridge, 111; on the 

 term ' salses,' 152; on Hoi berg's 

 satire, ' Travels in the World 

 Underground,' 164; on the Aurora 

 Borealis of Oct. 24, 1847, 188, 190, 

 194; on the electricity of the atmo- 

 sphere during the aurora, 195; on 

 volcanic phenomena, 198, 199; de- 

 scription of the seismometer, 200; 

 on the great earthquake of Lisbon, 

 206; impression made on the na- 

 tives and foreigners by earthquakes 

 in Peru, 212; earthquakes at Lima, 

 213; on the gaseous compounds of 

 sulphur, 214 ; on the Lake of Laach, 

 its craters, 215; on the emissions of 

 inflammable gas in the district of 

 Phaselis, 220 ; on true volcanoes as 

 distinguished from salses, 221 ; on 

 the volcano of Pichincha, 225 ; on 

 the hornitos de Jorullo, as seen by 

 Humboldt, 227; general rule on 

 the dimension of craters, 228; on 

 the ejection of fish from the vol. 

 cano of Imbaburu, 231 ; on the little 

 i-ie of Volcano, 232; volcanic steam 

 of Pantellaria, 233; on Daubeney's 

 work ' On Volcanoes,' 235 ; account 

 of the Island of Santorino, 240; of 

 the island named Sabrina, 241 ; on 

 the vicinity of extinct volcanoes to 

 the sea, 243; meaning of the Chinese 

 term ' li,' 245 ; on mineral metamor- 

 phism, 248; on fossil human re- 

 mains found in Gi.<ulaloupe, 250; 

 on minerals artificially produced, 

 ^60, 270; fossil organic structures, 

 273, 274; on Coprolites, 273; 

 geognostic distribution of fossils, 

 278; fossil fauna of the Sewolik 

 hills, 281 : thickness of coal mea- 

 eures, 281; on the umber piue 



forests of the Baltic, 287; elevation 

 of mountain chains, 290; the din. 

 ornis of Owen, 291; depth of th 

 atmosphere, 307 ; richness of organic 

 life in the ocean, 315; on filaments 

 of plants resembling the spermatozoa 

 of animals, 350 ; on the DiatomacesR 

 found in the South Arctic Ocean, 

 351, 352; on the distribution of the 

 floras and faunas of the British Isles, 

 357, 358; on the origin and diffu- 

 sion of the British Flora, 363, 364. 



Translatory motion of the Solar Sys- 

 tem, 135140 



Trogus, Pompeius. on the supposed 

 necessity that volcanoes were de- 

 pendent on their vicinity to the sea 

 for their continuance, 242, 243; 

 views of the ancients on spontaneous 

 generation, 355. 



Tropical latitudes,, their advantages 

 for the contemplatlor of nature, 1 1, 

 12; powerful impressions from their 

 organic richness and fertility, ]3; 

 facilities they present for a know- 

 ledge of the laws of nature, 14; 

 transparency of the atmosphere, 100, 

 101 ; phosphorescence of the sea, 1 97. 



Tschudi, Dr., extract from his ' Tra- 

 vels in Peru.' See Translator's note, 

 212,213. 



Turner, note on Sir Isaac Newton, 

 120. 



Universality of animated life, 351. 



Valz, on the comet of 1 618, 91. 

 Varenius, Bernhard, his excellent gene- 

 ral and comparative Geography, 48; 

 edited by Newton, 49. 



Vegetable world, as viewed with micro, 

 scopic powers of vision, 349, 350; 

 its predominance over animal life 

 352. 



Vegetation, its varied distribution on 

 the earth's surface, 8 10, 43; rich, 

 ness and fertility in the tropics, 12 

 14 ; zones of vegetation on the decli- 

 vities of mountains, 8 11, 355 

 360 See Etna, Cordilleras, Hima. 

 layas, Mountains 



Vico, satellites rf Saturn, 81. 



Vigue, measurement of Ladak, 340. 



Vim-, thermal scale of its cultivation 

 331 



