The Natural Hijiory 



the lightefl: of all, which fubfiding 

 laft^ fettied at the Surface, and cover- 

 ed all the reft : that this very various 

 Mifcellany of Bodies being determined 

 to fubfidence in this Order meerly by 

 their different fpecifick Gravities, all 

 thofe which had the fame degree of 

 Gravity fubfided at the fame time, fell 

 into, and compofed, the fame Stratum ; 

 fb that thofe Shells, and other Bodies, 

 that were of the fame fpecifick Gravity 

 with Sand| funk down together with 

 it, and fo became inclofed in the Strata, 

 of Stone, which that Sand formed or 

 conftituted : thofe which were lighter, 

 and of but the fame fpecifick Gravity 

 with Chalk (in fuch places of the 

 Mafs where any Chalk was ) fell to 

 the bottom at the fame time that the 

 Chalky Particles did, and fb were en- 

 tombed in the Strata of Chalk ; and in 

 like manner all the reft : that accor- 

 dingly we now find in the Sand-ftone 

 of all Countries (the fpecifick Gravity 

 of the feveral forts whereof is very lit- 

 tle different, being generally to water 

 as 2 i or 2 ?6 to I ) only thofe Concha, 

 Fe&ines, Cochlece^ and other Shells that 

 are nearly of the lame Gravity, ( vm. 

 2 4 or 2^ tQ i) but thefe are ordinarily 



found 



