358 



INDEX. 



Post-tertiary period 368, 389 



Post-tertiary period, divisions 



of 390 



Post-tertiary period, animals 



of 404 



Post-tertiary period, length of 400 

 Post-tertiary period, rivers of 401 



Potosi, situation of., 164 



Primary forms of crystals.... 25 



Protogine 146 



Protozoans 256 



Pterichthys 300 



Pterodactyl 355, 356 



Pudding-stones 143 



Pulpit Rock 182 



Pumice 155 



Pyramids, of what rock built 239 



Pyrites, iron 50 



Pyrites, copper 51 



Pyroxene 124 



Quartz 113 



Quartz rock 150 



Quito, situation of 164 



Radiates 257 



Realgar 55 



Reconstruction 435 



Red lead 81 



Reptiles of age of Coal 333 



Reptiles of Tertiary period .. 377 

 Reptiles of Triassic period... 345 

 Reptilian age, destruction of 



life at close of. 365 



Reptilian age, uplifts at close 



of 364 



Rhodium 94 



Richmond, white clay of. 240 



Ripple marks 210 



Ripple marks on Silurian 



beach 280 



Rivers, amount of deposits 



from 178 



Rivers, deposits in 174 



Rivers, improvement of 175 



Rivers of post-tertiary period 401 

 Rivers, systems of 165 



Roches montonnees 394 



Rock, definition of 138 



Rocks, disintegration of. 434 



Rocks, elementary substances 



in 139 



Rocks, kinds of 140-145, 211 



Rocks, order of succession of 213 

 Rocks, regularity of form in.. 23 

 Rubies 126, 127 



Salt mines 98 



Salt of Triassic system 342 



Saltpetre 96 



Salt springs 98 



Sand 234 



Sand moved by wind 205 



Sandstones 151 



Sapphire 126 



Satin spar 60, 101 



Schists 149 



Scoria 155 



Sea-beaches 398 



Secondary forms of crystals.. 26 



Serpentine 122 



Shales 149 



Shells in rocks 239, 246, 258 



Shells, silicious 240 



Sigillaria 321 



Silica 112 



Silica in solution 116 



Silica in two states 117 



Silica, petrifactions with 118 



Silicates Ill 



Silicious rocks 145 



Silurian age, climate of. 288 



Silurian age, life in 281 



Silurian age, subsidences and 



elevations in 289 



Silurian beach 280 



Silurian copper 277 



Silurian salt 278 



Silurian shales, carbonaceous 



matter in 283 



Silurian system, distribution 



of 276 



Silurian system, rocks of..... 274 

 Silver 00 



