CONTENTS. xxiii 



6. Iron Pyrites, 387 13. Copperas, 399 



6. Magnetic Iron Pjnrites, 392 14. Alumina-Sulphate of Iron,.. . . 400 



7. White Iron Pyrites, 393 15. Chrome-Iron Ore, 400 



8. Arsenical Iron Pyrites, 394 16. Vivianite, 401 



9. Scorodite, 396 17. Cacoxenite, 402 



10. Iron Sinter, 396 18. Ilvaite, 403 



1 1. Spathose Iron, 397 19. Silicate of Iron, 404 



12. Ankerite, 398 20. Hudsonite, 405 



ORDER II. MANGANESE. 



1. Oxide of Manganese, 406 2. Manganese Spar, 406 



3. Babingtonite, 407 



ORDER III. ZINC. 

 1. Zinc Blende, 408 2. Cadmia, 411 



ORDER IV. LEAD. 



1. Galena, 412 4. Yellow Lead Ore, 416 



2. White Lead Ore, 414 5. Pyromorphite, 417 



3. Anglesite, 415 6. Vauquelinite, 418 



ORDER V. BISMUTH. 

 Native Bismuth, 419 



ORDER VI. COPPER. 



1. Native Copper, 420 4. Copper Pyrites, 423 



2. Red Copper Ore 421 5. Green Malachite, 425 



3. Vitreous Copper, 422 6. Azurite, 426 



ORDER VII. TITANIUM. 



1. Native Titanium, 427 4. Ilmenite, 431 



2. Anatase, 428 /- 5. Sphene,. 433 



3. Rutile, 428 6. Warwickite, 436 



ORDER VIII. MOLYBDENUM. 

 Molybdenite, 438 



ORDER IX. ARSENIC. 

 Orpiment, 439 



, ORDER X. CERIUM. 



Allanite, 440 



ORDER XI. SILVER. 

 1. Native Silver, 442 2. Vitreous Silver 443 



