the theory that I shall advance later. Here the filling was made by
means of a point drawn over the skin from one end of a two-point
distance to the other.

These experiments were made on four different parts of the skin--the
forehead, the back of the hand, the abdomen, and the leg between the
knee and the thigh. I here forsook the plan which I had followed
almost exclusively hitherto, that of comparing the cutaneous distances
with each other directly. The judgments now were secured indirectly
through the medium of visual distances. There was placed before the
subject a gray card, upon which were put a series of two-point
distances ranging from 2 to 20 cm. The two-point distances were given
on the skin, and the subject then selected from the optical distances
the one that appeared equal to the cutaneous distance. This process
furnished the judgments on open spaces. For the filled spaces,
immediately after the two-point distance was given a blunt stylus was
drawn from one point to the other, and the subject then again selected
the optical distance which seemed equal to this distance filled by the
moving point.

The results from these experiments point very plainly in one
direction. I have therefore thought it unnecessary to go into any
further detail with them than to state that for all subjects and for
all regions of the skin the filled spaces were overestimated. This
overestimation varied also with the rate of speed at which the stylus
was moved. The overestimation is greatest where the motion is slowest.

Vierordt[7] found the same result in his studies on the time sense,
that is, that the more rapid the movement, the shorter the distance
seems. But lines drawn on the skin are, according to him,