H, 



1 



t 



h 



iC( 



'01 



J- 





:eii'{ 



^. 



s 



part 

 :all' 



00' 



I 



th 



). 



I 



■itt 



IS. 



as 

 be 



r 







k 



»i 



HUTTONIAN THEORY. 



249 



elted 



from belo 



• 



B 



faa 



mines are lefs rich as they defcend farther 

 though it may hold in fome inftances, is not ge 



d may therefor 



b 



fiiDpofed to 



fe 



from local caiifcs, fuch as are, 

 accidental, and beyond the lii 



fpe6t of 

 ) which 



theories 

 mines o 



be expeded to reach. Th 



f Mex 



IS the 

 d Peru are faid to be fub- 



jed; to the preced 

 of Derbyfhire ar 



ul 



b 



ire and Ci 

 derftood to take 



in the mines 

 very contrary 



Befides. what 



f 



mme, are 



are pleafed to call the riches ( 

 riches relatively to us, and relatively to a diitinc- 

 tion which nature does not recognife. The fpars 

 and veinllones which are throw-n out in the rub- 

 bi(h of our mines, maybe as precious in the eyes 



of 



as 



ducive to the great objeds of 

 her economy, and are certainly as chara6leriftic 

 of mineral veins, as the ores of iilver or gold, to 



great a value. Unlefs the 

 former are in fmaller quantity, or lefs highly 

 cryftallized at great than at fmall depths, which 



hich 



attach fo 



lb 



eve is not i 

 n from fubfl: 



d 



no 



which 



nclulio] 

 occupy 



b 



ral but a fm 

 their dilfenn 



proport 



of any 



gh 



d 



and, 

 feefn 



be ahvays guided by the fame law 



3. A 



f the veins were filled by dep 



from above, w^e ought to difcover in thern 



fuch 



