104 Animal Intelligence 
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ae lee | ba | og 
fa,/38. | 3s :: 
3 Apparatus Bes 33 3 hel 3 “3 
a ee2|ebs| sks | 2 
283 ae 2| eFe é 
B52 | SES | gas a 
a a is 
Cat 1 F (String outside unfastened) | 55.00] 77 | 120.00 | 20.00 
Cat 5 G (Thumb latch) . . . .| 57.00} 59 55-00 | 10.00 
Cat 7 G (Thumb latch) . . . .| 50.00] 30 35.00 | 10.00 
Cat 2 G (Thumb latch) . . . .| 54.00] 141 | 110.00 | 20.00 
Dog 2 BBr (O at back, high) . .| 48.00 30 80.00 | 60.00 
Dog 3 BBr (Oat back, high) . .| 20.00] 85 55.00 | 10.00 
Dog 2 M (Lever outside) . . . .| 15.00] 95 | 140.00 | 30.00 
Dog 1 FF}. . 7... 1. . «| 30.00} rr0 | 135.00 | 60.00 
Chick 89 | X (see page 53). . . . «| 20.00] 30 60.00 | 30.00 
Cat 13 KKK? . . 2... . «| 40.00 65 60.00 | 10.00 
animals failed because they did not attend to the process 
of being put through the movement, that, had they attended 
to it, they would later themselves have made the movement. 
It is, however, improbable that out of fifty times an animal 
should not have attended to what was going on at least two 
or three times. But if seeing himself do it was on a par with 
feeling an impulse to and so doing it, even two or three 
times would suffice to start the habit. And it is even more 
improbable that an experience should be followed by keen 
pleasure fifty times and not be attended to with might and 
1 FF was a box 40 X 21 X 24 inches, the door of which could be opened 
by putting the paw out between the bars to its right and pulling a loop which 
hung 16 inches above the floor, 4 inches out from the box and 6 inches to 
the right of the door. 
2? KKK was box K with both bolts removed. All that had to be done 
was to poke the paw out at one side of the door and press down a little bar of 
wood. 
3 The cats and chick were left in for two minutes at each trial, the dogs 
for from one to one and a half minutes. 
