MINERALOGY. 



117 



The principles of this arrangement which has been at 

 present pretty generally followed, were first published 

 in my essay ' Das natuiiiche System der Erze/ 

 1809. In order to gain a proper insight into the serial 

 gradation of all the families we must first regard the 4th 

 order. 



ORDER I. 

 Earth-Ores Ochres. 



1. Silicious-Ochres . 



2. Argillaceous-Ochres 



3. Talcose-Ochres . 



4. Calcareous-Ochres 



5. Salt-Ochres . . 



6. Inflammable-Ochres 



7. Ore-Ochres . 



8. Water-Ochres . 



9. Air-Ochres 



10. Fire-Ochres 



. Metallic calces with silicious earth, as 

 Lierite,Dioptase, Electric calamiue. 



. Clay-iron-stone. 



. Blue-iron-stone. 



. Black oxyde of manganese. 



. Calces not peroxydized. Bog-iron. 



. Pure calces without metallic lustre, as 

 Wolfram, Protoxide of Uranium, 

 Rutile, Tin-stone. 



. Oxydulated, as Iron-glance, Red oxyd 

 of Copper. 



. Hydrates, as Brown-iron-stone-ore, 

 Gray ore of manganese. 



. Malm-rocks ; volatilized Ochres of the 

 difficultly fusible metals, as Umbra, 

 Yellow earth, Earthy manganese, 

 Black cobalt. 



. Slags, volatilized calces of the difficultly 

 fusible metals, as oxyde of or White 

 antimony, Protoxide of Arsenic. 



ORDER II. 

 Salt-Ores Haloids. 



Fain. 4. Earth-Haloids . . 



5. Salt-Haloids . . 



6. Inflammable-Haloids 



7. Ore-Haloids 



8. Water-Haloids 



9. Air-Haloids . 

 10. Fire-Haloids 



. Pluoric-acid. 



. Boracic-acid. 



Sulphuric-acid, as Sulphate of lead, 

 Phosphoric-acid as Green and Blue 

 phosphates of iron, Diarsenate of 

 iron, Uran-glance, Green phosphate 

 of Lead. 



. Chromic-acid, as Chromate of lead, 

 Arsenic-acid, as Cube-ore, Arseniate 

 of iron, Olivenite, Cobalt-bloom. 



. Hydrochloric-acid, as Muriate of cop- 

 per, Horn-silver. 



. Nitric-acid. 



. Carbonic-acid, as Iron-spar, Red manga- 

 nese-ore, Earthy blue-copper, Mala- 

 chite, Carbonate of lead. 



