5^ 



^. 



ILLUSTRATIONS OF THE 



X 



This ought to be confidered as a ftrong proof, 

 that the phenomena known to mineralogifts are 

 fufficient to juftify the. attempts to form a theo- 

 ry of the earth, and are fuch as lead to the fame 



was not only no pre- 

 i very marked oppoli- 



fi 



here there 



\^ious concert, b 

 tion. I have all 



ady obferved, that the 



greater tendency to agree among geological theo 

 Ties, than among the authors of thofe theories. 



mce worthy of confide 



455 



Another circumftance wo 



s, that in the fearch which the Neptunifts 



have made, for hSis mod favourable to the aque- 

 ous formation of minerals, we find hardly any of 

 a kind that was unknown to the author of the 

 fyfiiem here explained. The appearances on 

 M'hich Werner grounds his opinion with re- 



F 



fped to bafaltes, and by which he would ex- 

 clude the action of fire from any ihare in the 

 formation of it, are all comprehended in the 



alternation of that rock with beds, or ftrata 



V thefe ap- 



gm 



No 



ell known to Dr H 



d 



obvioufly of aqu< 

 pearances were v 

 are eafily explained by his theory, provided the 

 effeds of compreffion are admitted. From this, 

 and the other circumfiances jufl: obferved, I am 

 difpofed to think, that the great fads on which 

 every geological fyftem mud depend, are now 



It it is not too bold an antici'pa- 



known. and th 



fay, that a theory of the earth, which 



explain^ 



] 



i 



i 



i 



i 

 i 

 1 



i 



1 

 1 



< 



c 



3 

 1 



4 

 \ 



