Meteorology By Aristotle

Some things, e.g. copper and wax, are impressible, others, e.g. pottery
and water, are not. The process of being impressed is the sinking
of a part of the surface of a thing in response to pressure or a blow,
in general to contact. Such bodies are either soft, like wax, where
part of the surface is depressed while the rest remains, or hard,
like copper. Non-impressible bodies are either hard, like pottery
(its surface does not give way and sink in), or liquid, like water
(for though water does give way it is not in a part of it, for there
is a reciprocal change of place of all its parts). Those impressibles
that retain the shape impressed on them and are easily moulded by
the hand are called 'plastic'; those that are not easily moulded,
such as stone or wood, or are easily moulded but do not retain the
shape impressed, like wool or a sponge, are not plastic. The last
group are said to be 'squeezable'. Things are 'squeezable' when they
can contract into themselves under pressure, their surface sinking
in without being broken and without the parts interchanging position
as happens in the case of water. (We speak of pressure when there
is movement and the motor remains in contact with the thing moved,
of impact when the movement is due to the local movement of the motor.)
Those bodies are subject to squeezing which have empty pores-empty,
that is, of the stuff of which the body itself consists-and that can
sink upon the void spaces within them, or rather upon their pores.
For sometimes the pores upon which a body sinks in are not empty (a
wet sponge, for instance, has its pores full). But the pores, if full,
must be full of something softer than the body itself which is to
contract. Examples of things squeezable are the sponge, wax, flesh.
Those things are not squeezable which cannot be made to contract upon
their own pores by pressure, either because they have no pores or
because their pores are full of something too hard. Thus iron, stone,
water and all liquids are incapable of being squeezed.