The Mental Life of the Monkeys 
231 
length of time the animal failed. Figures without an F de- 
note the time taken by the animal to operate the mechanism. 
As a supplement to Table 12 I have made a summary of 
the cases where the animals did succeed after tuition, that 
shows the nature of the act shown them as compared with 
the act they made use of. 
SUPPLEMENT TO TABLE 12 
MODEL GIVEN OR ACT 
APPARATUS BUTUEENOUGH Act oF No. 1 Act or No. 3 
OOO To pull upper Pulled both strings 
string. alternately, but 
upper enough 
more to succeed. 
QQ To push bar in. Inserted fingers be- 
tween bar and its 
slot and pulled 
and pushed 
vaguely. 
RR To pull plug out | Pulled and bit. 
with right hand. 
VV To pull loop off nail | Similar. 
{with right hand. 
QQ (a) | To pull bar around | Pulled back andj Pulled back and 
toward him. forth indiscrimi- forth indiscrimi- 
nately. nately. 
QQ (b) | To pull bar around | Pulled back and 
toward him in| forth indiscrimi- 
24 continuous] nately. 
revolutions. 
QQ (c) To take nail and| Pulled back and | Similar or nearly so. 
pull directly out- forth. 
ward. 
Delta To push bar to right Did before tuition 
with right hand. by pulling wire; 
after tuition by 
chance movement 
of head. 
Theta To pull bolt up with Pulled door and 
right hand. worked bolt loose. 
