were made without deliberation always exhibited the strongest tendency
to illusion.

I have already said that the illusion for passive touch was greatest
when the two spaces were presented simultaneously and adjacent.
Dresslar has mentioned in his studies on the 'Psychology of Touch,'
that the time factor cannot enter into an explanation of this
illusion; but the experiments of which I have just spoken seem to
point plainly to a very intimate relation between this illusion and
the illusions in our judgments of time. We have here presented on a
diminutive scale the illusions which we see in our daily experience in
comparing past with present stretches of time. It is a well-known
psychological experience that a filled time appears short in passing,
but long in retrospect, while an empty time appears long in passing,
but short in retrospect. Now this illusion of the open and filled
space, for the finger-tip, is at every point similar to the illusion
to which our time judgment is subject. If we pronounce judgment on a
filled space or filled time while we are still actually living in it,
it seems shorter than it really is, because, while we pay attention to
the discrete sensations of external origin, we lose sight of the
sensations of internal origin, which are the sole means whereby we
measure lapse of time, and we consequently underestimate such
stretches of time or space. But when the sensations from the outer
world which enter into such filled spaces or times exist only in
memory, the time-measuring sensations of internal origin are allowed
their full effect; and such spaces and times seem much longer than
when we are actually passing through them.

I dwell on this illusion at a length which may seem out of proportion
to its importance. My object has been to show how widely different are