?8 jfcto v ■:: of tbi. V.< ' s \ cry of Silver 



countrv, borne any analogy to thofe which accompanied the 

 ait difoov 



Thtf« vi renin ftar. . rare, having been exami ned with 



more attention than ufual, ftiall be dated with as much pre- 

 cifion as it is poffihle to obtain, from the report of thofe prac- 

 tical miners only who have hitherto infpec'ied them. 



The facts which, deferve to be fir ft noticed are, the confined 

 and infulated petition of the mafs of filver ore; Jts great depth 

 from the furface of the mine; and its contiguity to a copper 

 LhIc. 



The lode in which it occurs is one of thofe crofs courfes, 

 as they are here called, which interfeel and derange the cop- 

 per lodes, and confequently are of a more recent formation. 



Lodes in this direction are ufually filled with quartz, but 

 frequently produce galena : and fometimes, inftead of galena, 

 fulphurated antimony. They appear here to conform to the 

 fame laws, except in the particular inftance now to be de- 

 icribed, which forms, indeed, a very remarkable exception. 



No ores of Iilver were obfervable in this lode until at the 

 depth of one hundred and ten fathoms from the furface, or 

 eighty below the adit or level ; and, at the farther depth of 

 ;hirty-two fathoms, they difappeared. 



They have been difcovered only in the neighbourhood of 

 one of the interfered copper lodes, extending no where above 

 twelve feet from this lode, on the north, or above thirty-two 

 feet from it on the fotith, and acquiring this their greateit 

 extent at the deepeli level; for the ufual dimenfions of the 

 iilver ore are not more than fix feet in the former fituation, 

 and twelve feet in the latter. 



It is remarkable that, at the point of contact or interfe&ion, 

 the contents of the filver lode are i'o poor as to be fcarcely 

 worth faving; and thofe of the copper lode are much lefs pro- 

 ductive of copper than at a little diftance from this point. 

 Moreover, that the copper lode, in the vicinity of the inter- 

 fection, feems to have been influenced by the fame caufes of 

 improvement and declenfion as the crofs lode; being richer 

 <>r poorer in copper, as the latter was, at a correfpondent 

 level, in filver. 



The richeit mafs of filver ore was found at the depth of 

 two fathoms above the lev< 1 at which it disappears. 



After this brief account of the mod ftriking facts, it may 

 foe proper to enter into a more particular deicriptiori of the 

 two lodes which appear, by their intcrfection, to have gene- 

 rated this body of extraneous matter. 



The copper lode bears nearly eaft and weft by the com- 



pafs ; 



