( 35 ) 
1 proceed therefore to examine more 
f artk»larly thdfc Solids digg'd out of the 
Earth,which have occaironed many con- 
troverfies, efpecially Incruftattoitsy Sedi- 
mentSi Angular Bodies, Shells Sea- 
Aniiuals> and Figures oi Cockles and 
flams* 
T o IncruHations do belong all forts of 
Stones made up of Lamella or plates,thc 
two furfaces of which are indeed parallel, 
but lye not in the fame plain. The Place 
where Incruftations are made, is the 
whole confine of the Fluid and Solid; 
whereby it comes to pafs,that the Figure 
of the Plates or Crufts anfwcrs to the fi¬ 
gure of the place, and that 'tis eafily de¬ 
terminable, which of them was concre¬ 
ted firft, which laft: For,if the Place be 
Concave, then the outer crufts were for¬ 
med firft» if the inner: If the 
Place be Un* even by various great pro- 
tuberaincies, there, when the narrower 
/paces were fill’d up by Plates firft made, 
new Plates were produced in the larger 
/paces. Whence ’tis eafy to render an ac- 
compt of all the varieties of Figures, 
which are feen in the Cuts of fuch Scones, 
whether they reprefent therround Veins 
Da of 
