.90 



ILLUSTRATIONS OF THE 



prcpofitions ; namely, that the fluidity which 

 preceded the conrolidation of mineral fubflances 

 was soiPLE, that is, it did not arife from the 

 combination of thefe fubltances with any fol- 



and, next, that after confoiidation, thefe 

 bodies have been raifed up by an expanfive 



vent ; 



fore 



p' 



ading from below, and have by that 

 means been brought into their prefent litaation. 

 Thefe two propolitions feem to me to be fun- 



ported 



all the evidence that is necefllu'y 



oilitute the mofl pcrfe6t demonftration. 

 •85. The other part of the general conclufi 



that fi 

 of tl 



properl 



heat. 



caufe 



e 



f th 





fluidity of thefe mineral bodies, and alfo 

 r fubfequent elevation, is not perhaps to 



be confldered as a truth fo fully demonftr 

 the two preceding propofitions : it is, no 



bl 



ons ; it is, no doubt, 

 f THEORY ; or a portion of one of thofe 



hich men feek to conned 



in the mind 



with the flat 



r 



pates of that 

 fonings cone 



by ^^ 



'. ft ate of nature that is prefent, 

 f it that are pafl; ; and partici- 

 certainty from which our rea- 

 ng fuch caufes as are not direct 



objeds of perception, are hardly ever exempted 



participates of th 



y flight de 



Lity 



h 



b 



dmi 



*, % 



h 



r.- 



fidered that the caufe afllgned has 



proved fuffi 



fo 



d : that th 



of any other known caufe ^ and 



that 



