Spontaneous generation, 354, 355. 



Springs, hot and cold, 216 223; inter- 

 mittent, 216 ; causes of their temper- 

 ature, 216219; thermal, 219, 353, 

 354; deepest Artesian wells the 

 wannest, observed by Arago, 220; 

 salses, 221224; inBuence of earth- 

 quake shocks on hot springs, 206, 

 219221. 



Stars, general account of, 68 74 ; fixed, 

 7174, 89; double and multiple, 

 73, 137; nebulous, 68, 69, 142; their 

 translatory motion, 136 140 ; paral- 

 laxes and distances. 136 139; com- 

 putations of Bessel and Herschel on 

 their diameter and volume, 138; 

 immense number in the Milky Way, 

 140 141; Stardust, 69; star gaug- 

 ings, 140; starless spaces, 141 142; 

 telescopic stars, 143; velocity of the 

 propagation of light of, 143, 144; 

 apparition of new stars, 144. 



Storms, magnetic, and volcanic. See 

 Magnetism, Volcanoes. 



Strabo, observed the cessation of shocks 

 of earthquake on the eruption of lava, 

 211; on the mode in which islands are 

 formed, 224 ; description of the Hill 

 of Methone, 239 240; volcanic 

 theory, 242 ; divined the existence of 

 a continent in the northern hemi- 

 sphere between Theria and Thine, 

 293 ; extolled the varied form of our 

 small continent as favourable to the 

 moral and intellectual development 

 of its people, 295 296. 



Struve, Otho, on the proper motion of 

 the solar system, 136; investigations 

 on the propagation of light, 143; 

 parallaxes and distances of fixed 

 stars, 143 ; observations on Halley s 

 Comet, 90. 



Studer, Professor, on mineral meta- 

 morphism. See note by Translator, 

 248. 



Sun, magnitude of its volume compared 

 with that of the fixed stars, 124; 

 obscuration of its disc, 121; rotation 

 round the centre of gravity of the 

 whole solar system, 134; velocity of 

 its translatory motion, 134, 135; 

 narrow limitations of its atmosphere 

 as compared with the nucleus of 

 other nebulous stars, 129, 130; ' sun 

 stones' of the ancients, 110; views 



of the Greek philosophers on the sun, 

 110. 



Symond, Lieut., his trigonometrical 

 "survey of the Dead Sea, 301. 



Tacitus, distinguished local climatic 

 relations from those of race, 361. 



Temperature of the globe, see Earth 

 and Ocean; remarkable uniformity 

 over the same spaces of the surface 

 of the ocean, 308; zones at which 

 occur the maxima of the oceanic 

 temperature, 309; causes which 

 raise the temperature, 325; causes 

 which lower the temperature, 326; 

 temperature of various places, an- 

 nual, and in the different seasons, 

 328, 329, 330335 ; thermic scale 

 of temperature, 330 332; of conti- 

 nental climates as compared with 

 insular and littoral climates, 328, 

 329 ; law of decrease with increase 

 of elevation, 334; depression of, by 

 shoals, 314; refrigeration of the 

 lower strata of the ocean, 308. 



Teneriffe, Peak of, its striking scenery, 

 4. 



Theodectes, of Phaselis, on the colour 

 of the Ethiopians, 362. 



Theon. of Alexandria, described comets 

 as ' wandering light clouds,' 85. 



Theophylactus, described Scythia, as 

 free from earthquakes, 199. 



Thermal scales of cultivated plants, 

 330332. 



Thermal springs, their temperature, 

 constancy, and change, 218 221; 

 animal and vegetable life in, 353, 

 354. 



Thermometer, 347. 



Thibet, habitability of its elevated 

 plateaux, 33840. 



Thienemanu, on the aurora, 191. 194. 



Thought, results of its free action, 34 ; 

 union with language, :37. 



Tiberias, Sea of, its depression below 

 the level of the Mediterranean, 301. 



Tides of the ocean, their phenomena, 

 310, 811. 



Tillard, Capt., on the sudden appear- 

 ance of the Island of Sabrina, 241 . 



Tournefort, zones of vegetation on 

 Mount Ararat, 356. 



Tralles, his notice of the negative elec- 



