Where these grains touch each other, they are so firmly united or settled
together, that they seldom part without breaking a hole in one or th'other
of them, such as a, a, a, b, c, c, &c. Some of which fractions, as a, a, a,
a, where the touch has been but light, break no more then the outward
crust, or first shell of the stone, which is of a white colour, a little
dash'd with a brownish Yellow, and is very thin, like the shell of an Egg:
and I have seen some of those grains perfectly resemble some kind of Eggs,
both in colour and shape: But where the union of the _contiguous granules_
has been more firm, there the divulsion has made a greater Chasm, as at b,
b, b, in so much that I have observ'd some of them quite broken in two, as
at c, c, c, which has discovered to me a further resemblance they have to
Eggs, they having an appearance of a white and yelk, by two differing
substances that envelope and encompass each other.
That which we may call the white was pretty whitish neer the yelk, but more
duskie towards the shell; some of them I could plainly perceive to be shot
or radiated like a _Pyrites_ or _fire-stone_; the yelk in some I saw
hollow, in others fill'd with a duskie brown and porous substance like a
kind of pith.
The small pores, or _interstitia_ eeee betwixt the Globules, I plainly saw,
and found by other trials to be every way pervious to air and water, for I
could blow through a piece of this stone of a considerable thickness, as
easily as I have blown through a Cane, which minded me of the pores which
_Des Cartes_ allow his _materia subtilis_ between the _aethereal_ globules.
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