r box measured twenty-two by
twelve by ten inches. According to the experimenter's calculations, the
only way in which Julius could obtain the banana was by placing the
smaller box upon the larger and then climbing upon them.

At 10 a.m. on March 5, Julius was admitted to the large cage, and the
banana was pointed out to him by the experimenter. He immediately set
about trying to get it, and worked diligently during the whole of the
period of observation, which, because of the unfinished condition of
some of the cages, was limited to slightly over ten minutes. Within this
period he made upward of a dozen fairly well directed attempts to obtain
the food. Chief among them were three attempts to reach the banana from
different positions on the left wall of the cage (as the experimenter
faced the laboratory); two attempts to reach it from different positions
on the right wall; two from the large box in positions nearly under the
banana; two from the large box with the aid of the experimenter's hand;
and one from the distant end of the cage(?). There occurred, also, less
definite and easily describable efforts to get at the reward.

On account of the unfinished condition of the cages, the experimenter
had to remain in the large cage with Julius during the test. This
interfered with the experiment because the animal tended both to try to
escape and to get the experimenter to help him with his task.
Particularly interesting is the latter sort of behavior. After the orang
utan had made two or three futile attempts to obtain the food he came to
the experimenter, who was standing in one corner of the cage, took him
by the hand, and led him to a point directly under the banana. He then
looked up toward the banana, grasped the experimenter's arm, raised it,
and then tried to pull himself up. He was not allowed to get the food by
climbing up on the experimenter. A few minutes later, he again led the
experimenter toward the banana, but receiving discouragement in this
activity, he proceeded to devote himself to other methods.

Apart from the distractions which have been mentioned above, Julius's
attention to the food was surprisingly constant. Whatever his position
with respect to it, he seemed not for an instant to lose his motive, and
to whatever part of the cage he went and whatever he did during the
interval of observation was evidently guided by the strong desire to
obtain the banana. Frequently he would look directly at it for