of the Earth. 



J! Dijfertation concerning Shells and 

 other marine Bodies^ found at 

 Land ; Proving that they were 

 originally generated and formed at 

 Sea : that they are the real ^oils 

 of once liDing Animals : and not 

 StoneSy or natural Fojjilsj as fome 

 late Learned Men haDe thought. 



I Shall be the more brief and (paring 

 in my ExtraQ: of this Differ tation, 

 in regard that coming on thus in order 

 before the other Parts of this Work, it 

 will it felf, of courfe, fee the Light 

 fbmewhat fooner than they, any of 

 them will. For which reafon, I fliali 

 at prefent only fay thus much of it in 

 general ; that therein I firft fairly lay 

 before the Reader the Arguments that 

 have been urged by thefe Gentlemen 

 to perfwade us that thefe Bodies are 

 mere Mineral Subftances 3 and having 

 detected the infufficiency of them, by 

 evincing from the moil plain and fim- 

 pie Reafon, how far they are from 

 being conclufive, and how much they 



