ISLE OF MAN. MINERAL VEINS. 577 



Laxey, nearly vertical, as far as any judgment can be 

 formed from above. Its breadth is irregular, and where 

 I measured it, varies from six to nine feet. 



The circumstances which attend the Brada vein, are 

 in every respect so like those at Laxey, that it would 

 be superfluous to describe them : I need only add that 

 the greatest proportion of copper was found near its 

 southern end, and that of lead near its northern one. The 

 quartz crystals are also here occasionally encrusted by 

 a deposit of chalcedony. 



The history of the mine at Foxdale appears so pre- 

 cisely similar to those already described, with the ex- 

 ception of the granite formerly mentioned, that it is 

 equally superfluous to dwell on it. The direction, dip, 

 and compositior^Bf this vein, were in every respect the 

 same. The only circumstance in which it differed, namely, 

 the presence of the granite, is now incapable of being 

 examined, from the demolished state of the workings. 



It is also unnecessary to notice the two other veins 

 which were mentioned. Neither of them was very pro- 

 ductive, and as far as the reportsof the miners go, they 

 bore a precise resemblance to th^fest. 



Having thus detailed the little information which I 

 was able to procure, either from personal observation, 

 or -recorded history, relating to the mines of this island, 

 it only remains to enumerate th&. !( independent mineral 

 substancesytthich are found in it, having already described 

 those whiSPfre evidently of foreign origin, in the account 

 of the alluvia of the country and of the sea shore. 



Quartz, as it is the most conspicuous of these, so it 

 is the most various in aspect. It is found scattered, 

 often in very large blocks, over every part of the surface. 

 Its origin is easily traced to the schist, in which it is 

 also frequently seen, forming detached irregular nodules 

 or veins, of greater or. less extent and intricacy. It is 

 most generally of a pure white, with a lustre approaching 

 to the oily ; sometimes, of a grey and dirty hue. Oc- 

 casionally it i^found of a. dove colour, and all these 



VOL. n. 



