h 



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of tile i 



i of SC 



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HUTTONIAN THEORt. 



297 



ble to be mifunderftood, that the followers of 



f 



the Huttonian fyftem would not rifk much, if 

 they were to leave the whole theory of whin- 

 ftone to the decilion of this fingle fad, and 

 fhould agree to abandon that theory altogether, if 

 the Neptunifts can (hew any phyfical or (latical 

 principle, on which the depoiition now defcribed 



poffibly have been mad 



point 



the rule, by which 



has given a llru(fl 



fo nicely flratified to arenaceous beds depolit 

 cd on a furface fo highly inclined. If 



no 



* fuch principle can be pointed out, though we 



cannot conclude that the Huttonian Theory is 



true, we certainly may conclude that the Nep- 

 tunian is falfe, 



260. Proofs of the igneous formation of whin- 



Itone, ftill more dire6l, are derived from the 



induration of the contiguous ftrata ; from their 



difturbance when interfered by veins of whin- 



ftone \ and from the charring; of the coal which 



happens to be in contact with thefe veins. Thefe 

 ^ are confidered above at § 66, 6j, &c. ; and it 

 is particularly taken notice of at § 66, that pie- 

 ces of fandftone are fometimes found as if floating 

 in the whinllone, and, at the fame time, greatly 

 altered in their texture. One of the bed and 

 mod unequivocal inftances of this fort which I 

 have fcen, is to be found on the fouth fide of 



Arthur's Seat, ne^r Edinburgh. The rock 



which 



