6S6 



APPENDIX. 



STRUCTURE I. Problematic 

 Gold. 



STRUCTURE II. Graphic Gold. 



There arc many other alloys. 

 The Sulphurets or gold are very 

 doubtful, as it may he separated 

 by mechanical means. 



There are no Oxyds nor Salts. 



DOMAIN V. 



IRON. 

 NOME I. ALLOYS. 



MODE!. Alloyed with Nickel. 

 II. Alloyed with lead, 

 c. 



NOME II. SULPHURETS. 



MODE III. Pyrites. 

 STRUCTURE I. Massive. 

 Aspect 1. Common. 

 2. Hepatic. 

 STRUCTURE II. Crystallised. 



MODE IV. Magnetic Pyrites. 



NOME III. OXYDS. 



MODE V. Magnetic Iron- 

 stone. 



STRUCTURE I. Compact. 



II. Laminar. 



III. Crystallised. 



IV. Iron Sand. 



MODE VI. Specular Iron Ore. 



STRUCTURE I. Massive. 



II. Crystallised. 



III. Micaceous Iron 

 Ore. 



MODE VII. Red Iron-stone. 



STRUCTURE I. Scaly. 



II. Red Ochre. 

 III. Compact. 



STRUCTURE IV. Red Hema- 

 tites. 



MODE VIII. Brown Iron- 

 stone. 



STRUCTURE I. Scaly. 



II. Ochraceous. 



III. Compact. 



IV. Brown Hema- 



tites. 



MODE IX. Spathose. 



STRUCTURE I. Amorphous. 

 II. Crystallised. 



MODE X. Black Iron Ore. 



STRUCTURE I. Compact. 



II. Black Hema- 

 tite. 



MODE XI. Clay Ore. 



STRUCTURE I. Ruddle, or Red 

 Chalk. 



STRUCTURE II. Columnar. 



III. Lenticular. 



IV. Jasper Ore. 



For common Clay Iron-stone, 

 see Petralogy. 



STRUCTURE V. Eagle Stone. 

 VI. Pisiform. 



MODE XII. Bog Iron Ore. 



Aspect 1. Morass Ore. 



2. Swamp Ore. 



3. Meadow Ore. 



NOME IV. SALTS. 



MODE XIII. Carbonate of 



Iron. 



MODE XIV. Phosphate of 

 Iron. 



STRUCTURE I. Compact. 



II. Native Prussian 

 Blue. 



III. With Manga- 

 nese. 



