Nor can you _bury_ a _light body_, as a
piece of Cork under it, but it presently _emerges_ or _swims_ as 'twere on
the top; nor can you lay a _heavier_ on the top of it, as a piece of Lead,
but it is immediately _buried_ in Sand, and (as 'twere) sinks to the
bottom. Nor can you make a _hole_ in the side of the Dish, but the sand
shall _run out_ of it to a _level_, not an _obvious property_ of a fluid
body, as such, but this dos _imitate_; and all this meerly caused by the
vehement _agitation_ of the conteining vessel; for by this means, _each_
sand becomes to have a _vibrative_ or _dancing_ motion, so as no other
heavier body can _rest_ on it, unless _sustein'd_ by some other on either
side: Nor will it suffer any Body to be _beneath_ it, unless it be a
_heavier_ then it self. Another Instance of the strange _loosening_ nature
of a violent jarring Motion, or a strong and nimble vibrative one, we may
have from a piece of _iron_ grated on very strongly with a _file_: for if
into that a pin _screw'd_ so firm and hard, that though it has a convenient
head to it, yet it can by no means be _unscrew'd_ by the fingers; if, I
say, you attempt to unscrew this whilst _grated on by the file_, it will be
found to undoe and turn very _easily_. The first of these Examples
manifests, how a body actually _divided_ into small parts, becomes a
_fluid_.
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