Part IV". of the Earth. 2 1 7 



the Earth : with an Enquiry why thefe 

 lye fometimes fb near the Surface, and 

 did not, (becaufe of their greater Gra- 

 vity) at the General Subfidence in the 

 Deluge t, fall to a much greater depth t ?^rt 2. 

 than we now find them : even to fuch ^^j,^;^ 

 a depth as to have Iain quite out of con/l 

 humane reach, and lb have been all 

 buried, and irrecoverably loft. 



2. An Examination of the Common 

 Doftrine about the Generation of ikfe- 

 talls and Minerals : and particularly 

 that of the Chymijls 5 with an Appen- 

 dix, relating to the Tranfmutation of 

 fetalis : deteding the Impoftures and 

 Elufions of thofe who have pretended 

 to it : and evincing the Impoffibility 

 of it from the moft plain, fimple, and 

 Phyfical Reafoiis : proving likewife 

 that there are no fuch natural Grada-^ 

 tionSy and Converfions of one Metall 

 ?ind Mineral into another, in the Earth, 

 9s many have fancied. As alio an 

 Account of the Mineral Juyces in the 

 Earth, which fbme Writers have ima- 

 gined to be I know not what Seeds of 

 Minerals, fhewing that they are, for 

 ihe far greateft part, nothing but Wa- 

 ter ftrongly impregnated with Mine- 

 yal Matter, which it derives from 



