The same is true of the two first curves of
Schillings (figures 10 and 11), whereas the third (figure 12) shows
distinctly the traces of the state of inhibition into which he fell, and
represents the same condition as when Mr. Schillings, while preoccupied,
tried to work with Hans. All the finer details of the phenomena in
question, were likewise unknown to these two subjects.

For purposes of a clearer understanding of the various curves, figure 5
is inserted to give the general scheme of their arrangement.

[Illustration: FIG. 5.]

All curves are to be read like script from left to right. The first is
the breathing curve of the questioner, the second, third and fourth
curves represent his head movements,--all translated through the
workings of the levers into up-and-down movements. The objective
direction of these head movements is indicated by the arrows. It will be
noted that (because the lever in question was one with two arms, and
therefore reverses all movements made) each lowering of the head is
indicated by a rise in the fourth curve, and each raising of the head is
recorded by a sinking in the same curve. The records of the head
movements forward and backward and to the left and right (curves 2 and
3) are two and one-half times the size of the actual movements; while
the curve of the movements up and down (curve 4)--which is of especial
interest to us--is five times its actual size. The fifth and sixth
curves, which record my own responses, represent the taps of the
horse,--the fifth indicating the number of taps and the sixth the
back-step, which was Hans's reaction when he noted the head-jerk of the
questioner. The seventh, the lowest line, indicates the time in
fifth-seconds. Since the rate at which the drum revolved was not uniform
for all the tests, the fifth-second marks do not appear the same
distance apart in all the records, but are farther apart the greater the
rapidity with which the drum revolved. For the experiment itself this is
quite immaterial. Figures 6 to 9 correspond in detail with the diagram
just described. Figures 10 to 12 differ only in that the breathing and
back-step curves (the first and sixth in the diagram) are lacking. In
these there is no response on my part to the head-jerk of the subject,
but tapping was continued _ad libitum_ (in the case of the illustrations
here given I tapped to 5). When these latter curves were taken the
ordering and the technique of the experiments had