Part IV. of theEartM 



235 



tremely fmall Admixture of other 

 Matter, which gave them their Tin- 

 ikuvQ. Which may ferve for a fur- 

 ther Inftance of the confufed ftate of 

 Minerals in the Earth : and of the 

 Uncertainty of their CoIours^ and 



Figures f. 



PART 



