IQQ KEPOBT OF NATIONAL MUSEUM, 1899. 



IV. Oxides Continued. 



10. Manganese oxides Continued. 



Braunite 254 



Polianite /a * 



Pyrolusite 



Manganite 



Psilomelane 



Wad or bog manganese 255 



V. Carbonates: 



1. Calcium carbonate 



Calcite; calc spar; Iceland *par 258 



Chalk 



Limestones; mortars; and cements 



Portland cement 



Roman cement 



Playing marbles 270 



Lithographic limestones 270 



2. Dolomite 274 



3. Magnesite 275 



4. Witherite 279 



5. Strontianite 279 



6. Rhodochrosite; dialogite 280 



7. Natron, the nitrum of the ancients 280 



8. Trona; urao 281 



VI. Silicates: 



1. Feldspars 281 



2. Micas 283 



3. Asbestos 2% 



4. Garnet 307 



5. Zircon 308 



6. Spodumene and petalite 308 



7. Lazurite; lapis lazuli; or native ultramarine 309 



8. Allanite; orthite 311 



9. Gadolinite 313 



10. Cerite 314 



11. Rhodonite 314 



12. Steatite; talc; and soapstone 315 



13. Pyrophyllite; agalmatolite; and pagodite 322 



14. Sepiolite; meerschaum 323 



15. Clays 325 



VII. Niobates and tantalates: 



1. Columbite and tantalite 353 



2. Yttrotantalite 354 



3. Samarskite 354 



4. Wolframite and Hiibnerite 355 



5. Scheelite 355 



VIIL Phosphates: 



1. Apatite; rock phosphates; guano, etc 356 



2. Monazite 3g3 



3. Vanadinite 3g7 



4. Descloizite 388 



5. Amblygonite gcjQ 



6. Triphylite and iithiophilite 39] 



