ning, have furnished him with such an assortment of habits and
skilled acts of all sorts that we can scarcely identify any longer the
native reactions out of which his whole behavior is built. That
decision being reached, we are still not ready to turn the prisoner
loose, but wish to keep him under observation for a while longer, in
order to see what use he makes of this vast stock of native and
acquired reactions. We wish to know how an individual, so equipped,
behaves from day to day, and meets the exigencies of life. Such, in
brief, is the task we have still before us.

Accordingly, one fine morning we enter our prisoner's sleeping
quarters, and find him, for once, making no use of his acquired
reactions, as far as we can see, and utilizing but a small fraction of
his native reactions. He is, in short, asleep. We ring a bell, and he
stirs uneasily. We {420} ring again, and he opens his eyes sleepily
upon the bell, then spies us and sits bolt upright in bed. "Well, what
. . ." He throws into action a part of his rather colorful vocabulary.
He evidently sees our intrusion in an unfavorable light at first, but
soon relaxes a little and "supposes he must be late for breakfast".
Seeing our stenographer taking down his remarks, he is puzzled for a
moment, then breaks into a loud laugh, and cries out, "Oh! This is
some more psychology. Well, go as far as you like. It must have been
your bell I heard in my dream just now, when I thought I saw a lot of
cannibals beating the tom-tom". Having now obtained sufficient data
for quite a lengthy discussion, we retire to our staff room and
deliberate upon these manifestations.

"The man perceives", we agree. "By the use of his eyes and ears he
discovered facts, and interpreted them in the light of his previous
experience. In knowing the facts, he also got adjusted to them and
governed his actions by them. But notice--a curious thing--how his
perception of the facts progressed by stages from the vague and
erroneous to the correct and precise. Before he was fully awake, he
mistook the bell for a tom-tom; then, more fully aroused, he knew the
bell. Ourselves he first saw as mere wanton intruders, then as
cheerful friends who wished him no ill; finally he saw us in our true
character as investigators of his behavior."

Following our man through the day's work and recreation, we find a
large share of his mental activity to consist in the perception of
facts. We find that he makes use o