12
PORTER
what she had done until she reached the floor and turned round. A little later in the series she hopped from the top and front edge of the box, turned as she did so, and seized the top string, D, in her claws. This is shown in Fig 4. This,
_Fig_4.jpg)
FIG. 4
The same bird as in Fig. i. String D more directly worked with now than formerly.
with slight modifications, to be pointed out later, came to be her fixed method of opening the door. And yet she tried this
_Fig_5.jpg)
FIG. 5
The same female English Sparrow using the beak in addition to her claws. The door was rather refractory. The other birds were certainly more interested.
