of 



t, 



( 



'- 



HUTTONIAN THEORY. 



S3 



diflance from the centre of the earth. This 



has been done, becaufe th 



refped: the abfolute 

 are more ambiguous 

 the change of thei: 



fting 



th 



g 



ppearances 



up of th( 



ofe, which 

 r pofition. 



vhich 



flrata 



ifped 



The 



former might be accounted for, could they be 



feparated from the latter, 

 ther by the retreat of the 



two ways 



ei- 



of the land 



the fea, or the railing up 

 ^ but the latter can be explained 

 only in one waj, and force us of neceflity to ac- 

 knowledge the exiftence of an expanding power, 

 which has adled on the llrata with incredible 

 energy, and has been direded from the centre 

 toward the circumference. 



\ 



When 



alTured of th 



(lence of 



fuch a power as this in the mineral regions, we 



fhould 



argue with ling 



ency if we 



did not afcrib 



to it all the other appearan 



of motion in thofe regions, which it is adequate 

 to produce. If nature in her fubterraneous a- 

 bodes is provided with a force that could buril 



funder the 



fly pavement of the 



C3 



b 



d 



place the fragments uprigl 



could ft 



not, by 



t upc 

 fame effo 



dg 



* 



I-a 



C* 



fe them 



from the greateft depths of the fea, to the high- 

 eft elevation of the land ? The caufe that is ade- 

 quate to one of thefe effeds, is adequate to them 

 both together ; for it is a principle well known 

 in mechanical philofophy, that the force which 



I>3 



produces 



