XXX INTEODUCTION. 



dent, and involvinoj considerable loss of time in tracking the ores of each par- 

 ticular metal through the various Cases amongst which they are distributed. 



A far more generally useful mode of arrangement, and one recommended 

 by its greater comparative simplicity for working purposes, is that according 

 to which the following List of Minerals has been drawn up. It is based on 

 chemical composition, with the introduction of such modifications only as have 

 been considered likely to increase its practical utility. At the outset it com- 

 mences by making a broad distinction between the metallic and non-metallic 

 minerals; thus dividing minerals into two sufficiently well marked groups. 

 The former, again, are subdivided into four subordinate classes, and the 

 latter into five ; the different members composing each of which are allied to 

 one another by mutual aflSnities. Thus it will be perceived that each metal, 

 with its Ores and Salts, constitutes a group by itself; the latter being 

 formed with reference to the component bases of the Minerals, and not to 

 the Acids. 



The general principle of the classification here laid down is that followed 

 by Mr. Warington Smyth in his Lectures on Mineralogy at the School of 

 Mines. 



NON-METALLIC MINERALS. 



CLASS I. 

 Carbon and Boron. 



Carbon and its natural 

 Compounds, 



Diamond. 

 Boort. 



Graphite. 

 Tremenheerite« 



Coals. 



Anthracite. 

 Common Coal. 

 Cannel Coal.) 

 Torbanite. / 

 Brown Coal or Lignite. > 

 Jet. i 



Dysodile. 



Mineral Oils and Resins. 

 Naphtha. 

 Petroleum. 

 Bitumen. 

 Asphalt. 

 Elaterite. 



Amber. 

 Scleretinite. 

 Retinite. 



Piauzite. ■* 



Walchowite. 

 Copal ine. 



Highgate Resin. 

 Krantzite. 

 Berengelite. 



Middletonite. 



Anthracoxene. 



Pyropissite. 



Phylloretine. 



Ozokerite. 



Hatchettinei 



Idrialine. 



Tekoretine. 



Scheererite. 



Konlite. 



Konleinite. 

 Baikerite. 

 Fichtelite. 

 Guyaquillite. 

 Hartite. 



Hartine. 

 Ixolj'te. 

 Bog Butter. 



Inflammable Salts. 



Dinite. 



Dopplerite. 



Mellite. 



Boron. 



Boracic Acid, or Sassolin. 

 Borate of Ammonia, or Lar- 



derellite. 

 Borate of Soda, or Borax. 

 Borate of Lime, or Hayes - 



ine. 

 Borate of Magnesia, or Bo- 



racite. 



Stassfurtbite. 



Rhodizite. 

 Hydroboracite. 

 Lagonite. 

 Warwickite. 



CLASS IL 

 Sulphur and Se- 

 lenium. 



Sulphur. 

 Native Sulphur. 

 Selen- Sulphur. 



Selenium. 



Clausthalite. 



Selenbleikupfer. 



Selenkobaltblei, or Tilkerodite 

 Onofrite. 

 Lehrbachite. 

 Berzelianite. 

 Naumannite. 

 Selenkupferblei. 

 Eukairite. 



CLASS in. 

 Haloids and Salts. 



Ammonia. 

 Ammonia Alum, or 



Tsehermigite. 



Bicarbonate of Ammonia. 



