' of the Earth 1 1 



Thi^knefs, Depth, and other Circum- 

 itances of each : the Interruptions of 

 the Strata^ I naean the perfmdicuUr 

 ]| FifTures, which interfeft the horizon- 

 tal ones: the different Capacity or 

 Largenefs of thefe perpendicular In- 

 tervals; their Diftances from each ^ 

 other : and the Spar, and other Mine- 

 ral and Metallick Matter, ufually con- 

 tained in them. 



But, becaufe I faw that Deductions 

 of confiderable import and confequepce 

 jtnight be drawn from them, 1 have 

 with great Care and Intention obier- 

 ved the Condition of fuch heterogene- 

 ous Bodies, which I found immerfed 

 and included in the raafs of this Sand- 

 ftone; particularly the Shells of Oy- 

 fters, Mufcles, Scallopes, Cockles, Pe- 

 riwinkles, and very many other ma- 

 rine Produftions. I have, I fay, very 

 diligently noted all Circumftances of 

 thele Shells : the vaft Numbers of 

 them i the feveral kinds that are thus 

 lodged in the fubftance of the Stone : ' 

 the Order and Manner Qf their pofition 

 in it: the feveral Depths at which 

 they are found : the Matter which they 

 contaui in them, and wherewith their 

 Cavities are ufually filled. 



Thefe 



