ON MINERAL VEINS. 40J 



phosphurets might probably be procured in the moist 

 way as well as sulphurets. 



As to the evidence from nature, derived from the 

 intimate association between certain metallic minerals 

 and the earthy ones of aqueous origin, the chief of 

 these latter are calcareous spar and quartz, Barytes 

 and fluor are less conspicuous in this respect. The 

 union with calcareous spar is rather more frequent 

 than that with quartz : but as these different earthy 

 minerals, and particularly quartz and calcareous spar? 

 frequently occur together, it is not necessary to dis- 

 tinguish the metallic ones which, in some cases, seem 

 to be peculiarly associated either with the one or with 

 the other. The following list therefore contains those 

 which are found in these associations, arranged ac- 

 cording to their chemical natures and under the most 

 general terms. 



Metals and Alloys. 



Gold Bismuth 



Silver Tellurium 



Arsenical Silver Silver ; Amalgam 



Iron Antimony 



Copper Arsenical Pyrites 



Arsenical Cobalt Arsenical Nickel. 



Oxydes, 



Copper ; black, and red Arsenical Oxyde 



Iron ; Hematite Uranium ; green, and black 



Lead; Minium Manganese ; red, and black 



Titanium; Rutile, Anatase Cobalt; red, and black, 



Salts. 



Silver; Muriat Iron; Muriat, Arseniat, 



Copper; Muriat, Arseniat, Carbonat, Phosphat, 



Phosphat Tungsten ; Wolfram 



Jjead ; Phosphat, Carbonat, Zinc ; Carbonats 



Sulphat, Molybdat Bismuth; Carbonat 



Titanium; Silieat (Sphene.) 



i. p p 



