contact with the heavier point. But now if, while the points were in
contact with the skin and before the judgment was pronounced, I gave
the lighter point a slight jar, its presence and location were thereby
revealed to the subject. Then, too, it was found to be an advantage
that the judgments were thus confined to the longitudinal displacement
only; for, as I have before insisted, it was the relative, not the
absolute position that I wished to determine, since my object in all
these experiments in localization was to determine what connection, if
any, exists between judgments upon cutaneous distances made indirectly
by means of localization, and judgments that are pronounced directly
upon the subjective experience of the distance.

In the first of these experiments, in which two points of different
weight were used, the points were always taken safely outside of the
threshold for the discrimination between two points in the particular
region of the skin operated on. An inspection of the results shown in
Figs. 2 and 3 will indicate the marked tendency of the heavier point
to attract the lighter. In Figs. 2 and 3 the heavy curves were plotted
from judgments where both heavy and light points were given together.
The dotted curve represents the localization of each point when given
alone. The height of the curves at any particular point is determined
by the number of times a contact was judged to be directly under that
point. The fact that the curves are higher over the heavy points shows
that, when two points were taken as one, this one was localized in the
vicinity of the heavier point. When points were near the threshold for
any region, it will be observed that the two points were attracted to
each other. But when the points were altogether outside the threshold,
they seemed strangely to have repelled each other. As this problem lay
somewhat away from my main interest here, I did not undertake to
investigate this peculiar fluctuation exhaustively. My chief purpose