- 





Sulphur, on the mountains of, i, 458; 

 hills of in the West Indies, 4<> I, b.i.I 



of, n. 



Sulphuri-oiiis vapour*, on, i, 

 Sumatra, remarkable fog in, iv, \:>:1 

 >', nature of tin-, i, -13; on the spots 

 in the, 44; atmosphere of, . r > 1 ; As- 

 tronomical elements of, I4">; dis- 

 tance^ of I ho planets from the, 147 j 

 particular remarks on, 191 

 >'MH.V, on mock, iv, 521,521; in fire- 

 works, vi, 244 



Surrey, phenomenon observed in, ii, 48 

 SmpMUoMM river described, iii, 4 2 



<; agitation of waters in, ii, 48 j 

 meteors observed in, iv, 420 

 Swift, natural history of the, v, 638 

 Switzerland, earthquake in, ii, 21 

 Sn-ord, meteor like a, iv, 441 

 Sword-Jish, natural history of, v, 486 

 Sycamore of the scriptures, v, 47 

 Symbols, of astronomical, i, 35 

 Sympathy in two clocks, iv, 547 

 Synthesis, observations on, i, 17.~> 

 Syria, prevailing winds in, iv, 191 

 ^/rians, their letters, vi, 374 

 Systems of natural history, v, 5 

 Szelitze'in Hungary, excavation at,ii,79 

 Table hill, at the Cape of Good Hope, 



ii, 430 



Tables, on the Indian, i, 5 

 Tabor, description of mount, ii, 425 

 Tacitus, letter of Pliny to, i, 336 

 Tallow tree, account of the, v, 308 

 7 'amarind tree, description of the, v, 143 

 Tanais, on the ancient, iii, 21 

 Tangier, earthquake at, ii, 4() 

 Tannin ff, virtue of moss in, ii, 142 

 TH n lulus, on the cup of, iii, 81, 87 

 Tiirunta, in Arabia, passage of, ii, 449 

 Tarantula spider, account of, v, 467 

 Tasso, in Africa, swallowed up, ii, 42 

 Taurus, description of mount, ii, 424 

 Tm, natural history of, v, 101 ; me- 

 thod of cultivating, 103 } on the 

 trade of, lo/i 



Teak tree, description of the, v, 300 

 Tee*, fall of the, iii yjl 

 Telescope, discovery of the, i, 21 

 Telescopic planets, on the, i, 161 

 Temperature of the earth, iii, 107; of 

 the sea, 3.02; of the atmosphere, iv, 

 31; definition of, :,.\ 

 Tunpest, a remarkable, iv, 24 



Tenerijf, description of, i, 470 ; ar< -otini 

 of the pc.ik of, 471 } on the \\ini 

 of, v, 7 t 

 Terra australis, account of, iv, ul 



uci'J'u, >t, on the climate of, iv,S7 



Terrestrial ;ixis, imitation of tin . 

 Tesselateil pa\em< \\i discoven-i!, 

 Tixtnrrii'.is \\on.is described, v, 

 Trtuan, earthquake at, ii, 40 

 Thalcs, account of, i, 7 

 Thames, remarkable .million of \\\r, 

 ii, .">! ; inundation of the, 147; trees 

 under the, 154 ; description oi. 

 Than, on the lake of, iii, 243 

 Theatre, discovery of an ancient, ii, 242 

 Thermometer, principles of the, iv, 53 

 Thibet, mountains in, ii, 426 

 Thomas, account of the isle of St. iv, 83 

 Thorn apple, account of, v, 260; it* 



virtue in asthma, 2*>j 

 Thrush kind, natural history of, v, 618; 



the song, 621 ; the mimic, 624 

 Thnle, on the ultima, i, 446; the south- 

 ern, iv, 93 

 Thunder, on the electricity of, iv,300; 



storms, remarkable, 312, .i<il 

 Tiber, description of the, iii, 79; grove 



of the, iii, 7 1 



Tiberius, singular accident to, ii, 76 

 Ticunas, a vegetable poison, v, 267 

 Tides, on the inequality of, i, i. r >6; an 

 extraordinary one, 255 ; the New- 

 tonian system of, iii, 317 ; hypothesis 

 of St Pierre ou, 329; on tfie aerial, 

 iv, 40 



Tin mines, in Cornwall, account of 

 the, ii, 275; mode of working, 320; 

 nature and properties of, vi, 295; on 

 the purity of,297; applied to glass,325 

 Tinder-box, the pneumatic, , 

 Tinian, account of the isle of, iv, 83 

 Tinniny copper, method of, vi, 3ol, 



iron, 307 



Tivoli, on the town of, iii, 69 

 Toad, natural history of the, v, 56l ; 



fish, account of the, 531 

 Tobacco, on the infusion of, v, 231; 

 etnpyreumatic oil of, 234 ; descrip- 

 tion of, 303; machine for winding,307 

 Tola, on the balsam of, v, IK I 

 Tiimlnii'too, on the caravans of, ii, 485 

 Topical winds, on, iv, 232 

 Toplitz, agitation of the baths of, ii,57 

 Turnadoes, account of, iv, 248 



