[Illustration: FIG. 17.--THINKING OF A BUILDING.
Right hand holds pencil, and left hand holds record
plate. Subject facing ↑. In tracing I., direction of
the attention ↑; in tracing II., direction of the
attention ↓. Time of each record, 60 seconds. II. shows
respiration records.]
[Illustration: FIG. 18.--COUNTING THE STROKES OF A
METRONOME. Right hand holds pencil, left hand holds
record plate. Direction of the attention from A to B ↑,
from B to C →, from C to D ↓, from D to E ←. Time of
each portion, 45 seconds.]
To eliminate the record of the swaying of the body, we may experiment
with the subject seated; we obtain a distinctive record in which
certain phases of the fluctuations have almost disappeared, and
in which the record approximates to a straight line (tracing II.
of Fig. 14). One may also eliminate the record of the swaying by
dispensing with the automatograph, and simply holding the recording
plate in one hand and the recording device or pencil in the other;
for then the plate and pencil sway together, and naturally no record
of it is made. The relatively fine movements thus obtained are shown
in Fig. 16; the contrast between this record and such records as
Figs. 4, 5, 6, is mainly the contrast between a record in which
the general swaying of the body is registered, and one from which
it has been eliminated. It is interesting to note that in records
thus taken, there is but a slight difference in the result when the
subject is standing and when he is sitting; which is a further proof
that the swaying of the body has been eliminated. (Compare these with
Fig. 14.) Traces of periodic oscillations are noticeable in Fig. 16;
these are due to movements of respiration, and in tracing II. of
Fig. 17, they are unusually distinct and regular, about twenty to
the minute. In this case the forearm of the hand holding the record
plate was braced against the body, while the recording hand was held
free from it; and thus the abdominal movements were registered. The
movements toward the object of attention appear throughout. Fig.
17 shows a movement towards the rear of the subject, as well as
towards the front; which again shows that under suitable conditions,
involuntary movements may be recorded in one direction as readily
as in another. Fig. 18 presents a most beautifully regular movement
in all four directions. As the metronome, the strokes of which the
subject was counting, was carried from one corner of the room to
another and so on around the room, the hand involuntarily followed
it and recorded an almost perfect square. So striking and regular and
so varied an involuntary movement, in conformity with changes in the
direction of attention, one can expect to secure but seldom, and then
only with a good subject.
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