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Of Vacuum.

Some think the World would fall, and not hang so,
If it had any empty place to go.
One cannot think that Vacuum is so vast,
That the great VVorld should in that Gulf be cast;
But Vacuum is like to a porous Skin,
Where Vapour doth go out, and Air comes in;
And since that Vapour fills those places small,
VVe cannot think but they were empty all:
For were they all fill'd up, they could not make
Room, for succeeding Atomes place to take.
Wherefore if Atomes pass and repass through,
They needs must empty places have to go.
 

Atomes do so.