Solidity fills Space.       §2. This is the Idea belongs to Body, whereby we conceive it to
fill space. The Idea of which filling of space, is, That where we
imagine any space taken up by a solid Substance, we conceive it so
to possess it, that it excludes all other solid Substances; and, will
for ever hinder any two other Bodies, that move towards one another
in a strait Line, from coming to touch one another, unless it removes
from between them in a Line, not parallel to that which they move
in. This Idea of it the Bodies, which we ordinarily handle, sufficient-
ly furnish us with.