ed intently a few seconds and then
hastened back to the banana as if his task had been suggested to him by
the sight of the feeding animal. Most interesting and significant in
this behavior was the suddenness with which he would turn to a new
method. It often looked precisely as though a new idea had come to him,
and he was all eagerness to try it out.

On March 11, Julius was given another opportunity to obtain the banana
by the use of the three boxes. Although he used them together he made no
effort to place one upon another. Certain of his methods are shown in
plate V, especially by figures 21, 23 and 24.

This experiment was continued on April 2 under yet different conditions,
for this time only two boxes were placed in the cage, the one of them
the heavy, irregularly-shaped box and the other the smaller, lighter one
originally used. On the end of the heavier box had been nailed a two by
two inch wooden block in order to increase the difficulty in using this
box alone. As previously, Julius made varied attempts to obtain the
banana, but on the whole his interest and attention seemed somewhat
weaker than previously and there were indications of discouragement
because of repeated failures.

He handled the boxes conspicuously well, and it seemed at times that he
would certainly succeed in placing the one upon the other and in
reaching the food.

After one series of attempts from the sides of the cage and from the
large box, he deliberately turned away from the box and neatly executed
a somersault on the floor of the cage, as much as to say, "I am
disgusted with the whole situation." Again, later on the same day, after
falling from the top of the larger box, which tilted over very easily,
he rolled himself into a ball, and childlike, played with his feet. An
additional evidence of his changed affective attitude toward his task,
especially in connection with definite failures, appeared in his rough
handling and biting of the boxes. When most impatient, he worked very
roughly.

Julius was allowed to work for the reward from thirty to ninety minutes,
or, as a rule, until he had become completely discouraged on April 3, 5,
6, 7, 8, 9 and 13. His behavior was interesting and significant, but
nothing new appeared except that his willingness to work gradually
disappeared, and on April 13, although previously hungry, he made only a
single attempt to obtain the banana and then paid no further attention
to it.

The prolon