INDEX. 



359 



Silver, snlphuret of 52 



Slates 149 



Smalt 85 



Soapstone 121 



Soda, borate of 99 



Soda, nitrate of 97 



Soda, sulphate of 61 



Soil made in post-tertiary pe- 

 riod 403 



Soil, what it is 234 



Solfataras 202 



Sphinx, what made of. 239 



Spicula in flint nodules 362 



Spinel 127 



Stalagmites and stalactites... 103 



Stigmaria 321 



Strata 212 



Strata at different angles 217 



Strata, conformable and un- 



conformable 222 



Strata, flexures of 214 



Strata, mapping of. 220 



Strata, measuring of 221 



Strata, upheavals of. 216 



Stratification 212 



Stratified rocks 144 



St. Petersburg skeleton .". 406 



Strike 218 



Sub-carboniferous period 311 



Subsidences 233 



Sugar, crystallization of. 18 



Sulphur." 49 



Sulphurets 50-57 



Sulphureted hydrogen 64 



Sulphuric and sulphurous 



acids 63 



Syenite 146 



Synclinal lines 219 



Talc 121 



Talus 126 



Terrace epoch 396 



Terraces, how formed 397 



Tertiary period 368 



Tertiary period, deposits of.. 369 

 Tertiary period, mountains 

 made in ... .. 385 



Tertiary period, pachyder- 



mata of 382 



; Tertiary period, plants of 373 



Tertiary period, rocks of. 371 



Time in geology 432 



Tin 82 



i Tomboro 198 



Topaz 126, 133 



Tourmaline 132 



Tracks as evidences in geol- 

 ogy 210 



Tracks in Triassic rocks 346 



Trachyte 152 



Trap rocks 152-154, 348 



Trap rocks, how formed.. 229, 230 



Trap scenery 229 



Triassic period 339 



Triassic rocks 330 



! Triassic plants 343 



I Triassic salt 342 



i Triassic animals 344 



Trilobites 287 



Trilobites of age of Coal 332 



Tufa 195 



Turquois 119 



Unconformable strata 222 



Under-clay 310 



Unstratified rocks 144, 211 



Valleys, kinds of 227 



Venice white 63 



Ventriculites 361 



Veins 231 



Verd-antique 122 



Vertebrates... 260 



Vesuvius 195 



Viesch, glacier of 188 



Vitriols 58 



Volcanoes 163, 194 



Volcanoes, formation of 228 



Volcanoes of the Tertiary pe- 

 riod , 386 



Water as a leveler 192 



Water changing locality of 

 materials 173 



