HUTTONIAN THEORY. 



9 



I 



F 



Now, this being eftablifbed, and the fluidity 

 of the veins, when they penetrated into the fchi- 

 ftus, being obvious, it neceffarily follows, that 

 the whole granite mafs was alfo fluid at the 

 fame time. But this can have been brought 

 about only by fubterraneous heat, which alfo 

 impelled the melted matter againfl: the fuper- 

 incumbent fl;rata, with fuch force as to raife them 

 from their place, and to give them that highly in- 

 clined pofition in which they are ftill fupported 

 by the granite, after its fluidity has ceafed. Thus 



rendered probable by the cryftalli- 



ncluiion 



) 



zation of granite, is eilabliflied beyond all 



didion by the phenomena of granitic ve 



83. With the granite, 

 proof of the igneous oris 



we fhall 



der the 



f all mineral fub 



ftances as completed. Thefe fubft 



ther 



fore, whether flratified or unflratified. owe 



folid 



to the fa 



ne caufe, though acting 

 qf energy. The fl;rati 

 1 only foftened or pene 



unit 



with diflferent degrees 



fied have been in gener; 



trated by melted matter, wh 



fied have been reduced into perfed fufion. 



84. In this general conclufion we may difl: 

 guilh two parts, which, in their degree of c 

 tainty, differ perhaps fomewhat fro 



\ 



th 



The flril of thefe, and that which fland 



ft 



in point of evidenc 



nflflis of two 



propofitions ; 



t Note xv. 



^ ^ 



