576 



KARL T. WAUGH 



The next day another series was tried with the disk in its 

 original position and the whole apparatus turned around 180 

 degrees. 



Table turned 180 degrees 



Ye. 



Ye. 

 Ye. 

 Ye. 



Ye. 



S 



9 



10 



white 



joining 



white 



hitew 



white 



sec. 



16 

 3 

 5 



14 

 3 



shock 

 shock 

 shock 

 shock 

 shock 



( onclusions: While this is not an entirely satisfactory method 

 of studying the distance perception of the mouse, it makes possible 

 some inferences that are of value. The objections which maybe 

 made to the method are that the activity of the animal on the 

 disk, particularly the going round and round while hanging over 



