erstand, used by man in certain
countries, namely, that of placing the saw with the teeth up, holding it
rigid, and then rubbing the object which is to be sawed over it. This
Skirrl succeeded in doing very skillfully, for he would sit down on the
floor of the cage, grip with both feet the handle of the saw, with the
teeth directed upward, then holding either end in his hands, he would
repeatedly rub a stick over the teeth. In this way, of course, he could
make the saw cut fairly well. But still more to his liking was the use
of a spike instead of a stick as an object to rub over the teeth, for
with this he was able to make a noise that would have satisfied even a
small boy.

Further light is shed on the force of the tendency to imitate man by the
saw test. After Skirrl had been given an opportunity to show what he
could do with the tool spontaneously, I demonstrated to him the approved
human way of sawing. Often he would watch my performance intently as
though fascinated by the sound and motion, but when given the tool he
invariably followed his own methods. Although I repeated this test of
imitation several times on three different days, the results were wholly
negative.

_Other Activities_

One day as Skirrl was being returned to his own cage by way of the
larger cage, he picked up an unfastened padlock and carried it into the
cage with him. For more than an hour he amused himself almost without
interruption by playing with this lock. The things which he did with it
during that time would require pages to describe. His interest in it was
very similar to that which he had exhibited in hammer and nails, saw,
and indeed any objects which he could play with. The lock was pounded in
various ways, bitten, poked with nails, hooked into the wires of the
cage, used to pull on, pounded with a stick, used to hammer on the floor
of the cage with, and in fine, manipulated in quite as great a variety
of ways as a human being could have discovered. Finally it was hooked to
the side of the cage and snapped shut, and as Skirrl was unable to
dislodge it from this position, he shortly gave up playing with it.

At the end of the large cage and just outside the wire netting was a
faucet to which a hose was usually attached. The valve could be opened
by turning a wheel-shaped hand piece. Both Skirrl and Julius learned to
turn this wheel in order to get water to play with, but usually the
former's strength was not sufficient to turn o