224 Animal Intelligence 
7 
on that chair was present and effective. We may call these 
last the ‘on chair’ type of experiments. 
A sample experiment with a box is the following : — 
On January 4, 1901, box Delta (push back) was put in No. 
1’s cage. He failed in 5, though he was active in trying to 
get in for about 4 minutes of the time and pulled and pushed 
the bar a great deal, though up and down and out instead of 
back. In his aimless pushings and pullings he nearly suc- 
ceeded. He failed in 5 in a second trial also. I then opened 
the door of the cage, sat down beside it, held out my hand, 
and when he came to me took his right paw and with it (he 
being held in front of the box) pushed the bar back (and 
pulled the door open in those cases when it did not fall open 
of itself). He reached in and took the food and went back 
to the top of his cage and ate it. (No. 1 generally did this, 
while No. 3 generally stayed by me.) I then tried him alone; 
result 10 F; no activity at all. On January 5th I put the 
box in; result 1o F. He was fairly active. He pulled at 
the bar but mostly from a position on the top of the box 
and with his left hand; no attempts like the one I had tried 
to teach him. Being left alone he failed in 5. Being tried 
again with the door of the cage open and me sitting as I had 
done while putting him through the act, he succeeded in 7.00 
by pushing the bar with his head in the course of efforts to 
poke his head in at the door. I then put him through the 
act 10 times and left him to himself. He failed in 5.00; 
no activity. I then sat down by the cage as when teaching 
him. He failedin 5; little activity. Later in the day I put 
him through the act ro times and then left him to himself. 
‘He failed in 5; little activity. I sat down as before. He 
failed in five; little activity. On January 6th I put him 
through the act ro times and then left him. He failed in 
10. This was repeated later in the day with the same result. 
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