ing anything else between them, is called DISTANCE: if
considered in length, breadth, and thickness, I think it may be called
CAPACITY. When considered between the extremities of matter, which fills
the capacity of space with something solid, tangible, and moveable, it
is properly called EXTENSION. And so extension is an idea belonging to
body only; but space may, as is evident, be considered without it. At
lest I think it most intelligible, and the best way to avoid confusion,
if we use the word extension for an affection of matter or the distance
of the extremities of particular solid bodies; and space in the more
general signification, for distance, with or without solid matter
possessing it.

4. Immensity.

Each different distance is a different modification of space; and each
idea of any different distance, or space, is a SIMPLE MODE of this idea.
Men having, by accustoming themselves to stated lengths of space, which
they use for measuring other distances--as a foot, a yard or a fathom, a
league, or diameter of the earth--made those ideas familiar to their
thoughts, can, in their minds, repeat them as often as they will,
without mixing or joining to them the idea of body, or anything else;
and frame to themselves the ideas of long, square, or cubic feet, yards
or fathoms, here amongst the bodies of the universe, or else beyond the
utmost bounds of all bodies; and, by adding these still one to another,
enlarge their ideas of space as much as they please. The power of
repeating or doubling any idea we have of any distance, and adding it to
the former as often as we will, without being ever able to come to any
stop or stint, let us enlarge it as much as we will, is that which gives
us the idea of IMMENSITY.

5. Figure.

There is another modification of this idea, which is nothing but
the relation which the parts of the termination of extension, or
circumscribed space, have amongst themselves. This the touch discovers
in sensible bodies, whose extremities come within our reach; and the
eye takes both from bodies and colours, whose boundaries are within
its view: where, observing how the extremities terminate,--either in
straight lines which meet at discernible angles, or in crooked lines
wherein no angles can be perceived; by considering these as they relate
to one another, in all parts of the extremities of any body or space,
it has that idea we call FIGURE, which affords to the mind infinite
variety. For, b