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WALTER S. HUNTER 



lifted by the skin of the neek and dropped inside through the 

 door of the cage. Cole found that between the 22nd and the 

 57th trials all the raccoons turned and re-entered the box of 

 their own accord. From these tests, Cole concludes that any 

 raccoon will re-enter the box at least by the 100th trial. In the 

 second series, the animals were dropped through a hole in the 

 top of the box as in Thorndike's experiments. By the 22nd 



Figure 1. Plan of the arrangement of the boxes in the present tests. 



trial all the raccoons used in this latter test climbed upon the 

 box, via a step arranged for that purpose, and dropped inside. 

 All, however, had been trained in the first experiment, i.e., 

 in that of re-entering through the door. 



Let us now turn to the observations on the white rat which 

 it is the purpose of this paper to compare with the above results 

 obtained with cats and raccoons. The rats in question were 

 working on a problem in which the being " put through " was 

 merely incidental. The apparatus was in the same room as 



