CONTENTS. 161 



IX. Nitrates: Page. 



1. Niter, potassium nitrate 391 



2. Soda niter 392 



3. Nitro-calcite 394 



X. Borates: 



1. Borax or tincal; borate of soda 396 



2. Ulexite; boronatrocalcite 397 



3. Colemanite 397 



4. Boracite or stassfurtite; borate of magnesia 397 



XI. Uranates: 



1. Uraninite; pitchblende 402 



XII. Sulphates: 



NJB. Barite; heavy spar 405 



2. Gypsum 406 



3. Celestite 411 



4. Mirabilite; or Glauber salt 412 



5. Glauberite 415 



6. Thenardite 415 



7. Epsomite; Epsom salts 415 



8. Polyhalite 416 



9. Kainite 416 



10. Kieserite 416 



11. Alums: 



Kalinite 416 



Tschermigite 416 



Aluminite 419 



Alunite 419 



Alum slate or shale 421 



XIII. Hydrocarbon compounds: 



1. Coal series 423 



Peat 424 



Lignite or brown coal 425 



Bituminous coals 426 



Anthracite coal 427 



2. Bitumen series 429 



Marsh gas; natural gas 433 



Petroleum 434 



Asphaitum; mineral pitch 441 



Manjak 445 



Elaterite; mineral caoutchouc 446 



Wurtzillite '. 446 



Albertite 446 



Grahamite 447 



Carbonite or natural coke 449 



Uintaite; gilsonite 450 



3. Ozokerite; mineral wax; native paraffin 451 



4. Resins 455 



Succinite; amber 455 



Retinite 456 



Chemawinite 456 



Gum copal 457 



NAT MU8 99 11 



