incompassing fluid, may cause the undermost to be a little, though not
much, varied from a globular Figure. But this only by the by.

After what manner this _Kettering-stone_ should be generated I cannot
learn, having never been there to view the place, and observe the
circumstances; but it seems to me from the structure of it to be generated
from some substance once more fluid, and afterwards by degrees growing
harder, almost after the same manner as I supposed the generation of Flints
to be made.

But whatever were the cause of its curious texture, we may learn this
information from it; that even in those things which we account vile, rude,
and coorse, Nature has not been wanting to shew abundance of curiosity and
excellent Mechanisme.

We may here find a Stone by help of a _Microscope_, to be made up of
abundance of small Balls, which do but just touch each other, and yet there
being so many contacts, they make a firm hard mass, or a Stone much harder
then Free-stone.

Next, though we can by a _Microscope_ discern so curious a shape in the
particles, yet to the naked eye there scarce appears any such thing; which
may afford us a good argument to think, that even in those bodies also,
whose _texture_ we are not able to discern, though help'd with
_Microscopes_, there may be yet _latent_ so curious a _Schematisme_, that
it may abundantly satisfie the curious searcher, who shall be so happy as
to find some way to discover it.

Next, we here find a Stone, though to the naked eye a very close one, yet
every way perforated with innumerable pores, which are nothing else but the