Page:American Journal of Psychology Volume 21.djvu/21

Rh front of the box. As may be seen in the accompanying figure (Fig. 2), she opened the door in one of her first trials by



crawling in between the wire and strings and accidentally pulling on string B with the back of her head. In Fig. 3 is shown a way of opening the door which is, if such is possible,



even more accidental. Here she is pushing down on string B with her head turned away from the door. She did not know