had not, by- being commixtt with fom^ 
Fluid,^falling thence by its own weighty 
been made plain by the motion of the 
fame incumbent fluid. 
2. Bccaulb the greater Bodies con¬ 
tain'd in the fame Beds do for the moft 
part obferv^e the Laws of Gravity, both 
as to the fcite of each Body by it k%and 
as to the fcite of varioits Bodies amongft 
themlclves. 
3. Becaufe the Dufty matter of the 
Beds hath fo accommodated it lelf to the 
Bodies contain’d, that it hath filled 
up every fmall cavity of the contain’d 
Body, dnd expreffed the fmoothnefs and 
brightncfs of the fame Body in that part 
of its furface where it tqucheth it,though 
the roughnefs of the Dull anfwers not at 
all to fuch a fmoothnefs and glofs. 
But the Sediments are made thus, 
that the Matter contain’d in a Fluid falls 
by its own weight down to the bottom, 
whether thofe things contain’d be convey¬ 
ed thither from elfewhere, or be by little 
and little fecreted from the very parti¬ 
cles of the Fluid, and that either in the 
upper furface, cr equally from all the 
particles of the Fluid, 
Although 
