174 



ILLUSTRATIONS OF THE 



th 



fiimmit 



but if 



be fuppofed to tap 



mountains ufually do, we mufl multiply this fix 

 thoufand by three, in order to have the height of 

 thefe primeval mountains, which, therefore, were 



than eighteen thou 



originally elevated not lefs 

 fand feet: in height, therefore, they once rivaled 

 theCordelieras,and are now b ut poorly reprefenu 

 ed by the hills of Skidaw and Helvellyn. It were 

 eafy to fhew, that this eftimate is ftill below the 

 refult that ftridly follows from the Neptunian 

 bypothefis ; but it is unneceffary to proceed fur- 

 ther, than to prove, that the principle of the de- 

 gradation of mountains, is involved in that hypo- 

 thefis to an excelTive and improbable degree; and 

 that the fupporters of it, have either been guilty 

 of the inconliflency of refufing to Dr Hution the 

 moderate ufe of a principle, which they them- 



fel 



ploy 



m its utmoft extent, or of 



to the confeque 



having fufficiently adverted 

 of their own fyftem 



156. The formation of fecondary flrata froir 

 the degradation of the contiguous mountains, or 

 clofe examination, is fubjecl to many other dif 

 ficulties of the fame kind 



I 



dary ftrata, and nearly h( 



Mountains of feco 

 ^ontal, are found 



this ifland of the height of three thoufand feet. 

 ^uch are Ingleborough, Wharnfide, and perhaps 



hire. The 



whola 



(qui 



others on the 



ft of York 



