an artificial Spring of Water. ^• 



and the llrata, which compofe the central parts of it, and 

 which are found nearly horizontal in the plain, are raifed 

 almofl perpendicularly, and placed upon their edges, while 

 thofe on each fide decline like the furface of the hill ; fo that 

 this mountain may well he reprefented hy ahur made hy forc- 

 ing a bodkin through feveral parallel fheets of paper. At Rou- 

 ter, or Eagle-ftone, in the Peak, feveral large maflTes of grit- 

 ftone are feen on t'^e fides and bottom of the mountain, which 

 by their form evince from what parts of the fummit they were 

 broken off at the time it was elevated ; and the numerous loofc 

 flones fcattered about the plains in its vicinity, and half buried 

 in the earth, muft have been thrown out by explofions, and 

 prove the volcanic origin of the mountain. Add to this the. 

 vaft beds of toad-ftone or lava in many parts of this countyv 

 fo accurately defcribed, and fo well explained, by Mr. Wpiite- 

 HUKST, in his Theory of the Formation of the Earth., 



Now as all great elevations of ground have been thus raifed 

 by fubterraneous fires» and in a long courie of time their lum- 

 mits have been worn away, it happens, tl^at fome cf the mors 

 interior jftrata of the earth are expoled naked on the tops cf 

 mountains ; and that, in general, thofe flrata, which lie up- 

 permoft, or neareft to the fummit of the mountain, are th« 

 lowefl in the contiguous plains. This will be readily con- 

 ceived if the bur, made by thrufting a bodkin, through feveral 

 parallel Iheets of paper, had a part of its apex cut off by a pen- 

 knife, and is fo well explained by Mn Michell, in an inge- 

 nious paper on the Phicnomena of Earthquakes, publifiied a few. 

 years ago in the Philofophical Tranfaclions. 



And as the more elevated parts of a country are fo much 

 colder than the vallies^ owing, perhaps, to a concurrence of 



tv;o 



